CHAPTER VII

ESTIMATES OF COST

In order to estimate the cost of installing a sewage-disposal plant and

of treating continuously the sewage from any residence, certain

fundamental assumptions are always necessary. In the first place, the

unit cost of the manual labor which forms so large a part of the total

cost of construction must be known for the particular time and place,

and perhaps no item in the cost of construction is so important as this.

In a great many small installations it may be excluded altogether, since

all the hand work required is contributed by the householder at such

times as the other work of the place may allow, without any additional

cost. In other places, if a money value be placed on such labor, it may

be expressed in terms of the cost of a hired man whose rate of wages,

paid monthly, in addition to board, would be always less than if wages

were paid to day laborers living at their own homes. Again, in the

southern part of the country labor may be had for $1.25 a day, whereas

in the central portion of the United States it is necessary to pay $1.75

a day, and in the extreme West from $2.00 to $3.00 a day for common

labor. Often, too, the working day is of different length in different

parts of the country. In the estimates which follow, labor is assumed to

cost $1.60 for eight hours’ work, that is, at the rate of twenty cents

an hour. If, in adapting the estimates of this chapter to any particular

installation, the question of labor may be neglected because of the fact

that the householder will himself do all the required work, then the

item of labor cost may be eliminated. If other units than those here

assumed are suitable for the particular locality where any plant is to

be built, then the labor item must be modified accordingly.

_Material._—The cost of material always varies very greatly in different

parts of the country. This is partly because of different freight and

other transportation rates between the factories where material is made

up and the particular place where that material is to be used; and

partly because the profits made by the middleman increase as the

material gets further and further away from the centres of civilization.

Thus, in a large city six-inch sewer pipe may be sold in such large

quantities that the freight rate is low and the dealer is satisfied with

a small profit on each foot of pipe. In the country districts the dealer

sells but little, and feels that he must have a larger profit to

compensate him for the expense of keeping the material on hand. Thus,

six-inch sewer pipe may be had at prices ranging from six cents up to

sixteen cents per running foot, depending on the store from which it is

bought.

It is evident, therefore, that it will not be possible to name any unit

price which will be generally applicable, and it will be necessary for

any intending builder to secure from local firms the unit prices from

which his own individual estimate may be made up. The following

discussion, however, will indicate the items comprising the necessary

estimate, and will furnish an example by which the estimate sheet can be

prepared.

_Laying Sewers and Drains._—The main drain from the house to the sewage

disposal plant is of five- or six-inch pipe generally, the former being

sufficiently large and a little cheaper than the six-inch pipe. The

latter has the advantage of size and consequent greater freedom from

clogging. The cost of five-inch pipe at a store in a village of any

considerable size should be ten cents per foot, and the cost of six-inch

pipe twelve cents per foot.

This pipe weighs twelve and fifteen pounds per foot respectively, and,

with an ordinary wagon, fifty feet of six-inch pipe, weighing about

eight hundred pounds, is a load; if four trips a day are possible from

the residence to the store and if the cost of the team is estimated at

$4 a day, each trip will cost $1, and each foot of pipe will cost two

cents more for being hauled from the store to the grounds.

In laying the pipe, cement and sand are necessary for joints. For both

kinds of pipe there is required about one cubic foot of mortar for each

fifty joints, the mortar being sufficient to fill the joints and to make

a collar or ring outside. In order to make this cubic foot of mortar,

half a bag of cement and half a cubic foot of sand will be required. The

cost of the cement out of the village store is about fifty cents a bag,

although in a small place it may be seventy-five cents, or even one

dollar. If one were buying cement in large quantities, a price as low as

thirty cents a bag might be had. If the cement is delivered in cloth

bags, a rebate of ten cents a bag is usually given if the bag is

returned in good condition.

The cost of sand is usually dependent upon the cost of hauling. It will

require forty minutes to shovel one yard of sand into a wagon, or at

twenty cents an hour it would cost about fifteen cents. The cost of

shovelling sand through a screen depends upon the amount of material

which has to be rejected, since only a certain proportion of the sand is

available for all that is shovelled. The cost of this shovelling is

again about fifteen cents per cubic yard of material shovelled, and if

one-third of it is coarse gravel which has to be rejected, one and

one-half yards would have to be screened for every yard of sand

available, and the cost would, therefore, be twenty cents for screening,

a total cost of sand in the wagon of thirty-five cents per yard. If four

loads of sand can be delivered per day, with a cost of fifty cents per

hour for team and driver, the sand will cost $1.35 per yard on the

grounds, this amount being increased or decreased if the number of trips

per day must be made less or more.

_Excavation._—The cost of excavation depends on the character of the

material and on the amount of water present, the cost of pumping or

bailing the latter, if in large quantity, adding materially to the cost

of shovelling. The material through which the trenches are driven may

vary from a sand which can be shovelled without loosening, to solid rock

which must be blasted, an intermediate condition of soil being known as

hardpan and its excavation costing nearly as much time and effort as

rock itself. If the soil is sand, into which a shovel or spade can be

pushed without any picking of the material, the cost, as already stated,

will be about fifteen cents a cubic yard for shovelling, and if the

excavation is in trench and not more than six feet deep, the entire

trench can be excavated for seven and a half cents a lineal foot. It is

very unusual, however, to have conditions so favorable that such a low

price can be counted on. If the material requires picking, instead of

fifteen cents a cubic yard it will cost thirty cents a cubic yard, and a

trench two feet wide and six feet deep will cost fifteen cents a running

foot instead of seven and a half cents. If care is not taken at the

start to throw the dirt well back, it will be necessary to re-handle the

dirt from the bottom of the trench, throwing it back on the pile, and

this will add from five to ten cents a cubic yard, depending on what

proportion of the entire excavation has to be re-handled. In the

excavation for a tank, it is quite possible that the entire material may

have to be re-handled and the cost thus be increased by fifteen cents a

cubic yard. If the ground is very hard, as when boulders and clay are

intermixed, it may require twice as much time for loosening as for

shovelling, in which case the cost of digging the trench will be

forty-five cents a cubic yard, or twenty-two and a half cents per lineal

foot, with five or ten cents added if the material has to be re-handled.

If the material is a loose sand or gravel, the trench will probably

require sheeting, that is, boards or planks on each side of the open

trench with braces between, in order to prevent caving of the banks. If

new lumber has to be purchased for this purpose and its cost added to

the cost of excavation, an additional sum per cubic yard or per lineal

foot will be added, somewhat in proportion to the total amount of

excavation to be done. Finally, if the soil through which the trench is

being dug contains water, it may be necessary to have one or two men

continuously pumping during all the time that the excavation is going

on, and this also will add to the cost per cubic yard or per lineal foot

of the trench.

Refilling may be done by hand or may be done by a drag scraper at the

end of a rope, so that the team of horses may be on one side of the

trench and draw into it from the other side the excavated material. This

costs only five cents per cubic yard. If the dirt is thrown back by

hand, the cost will be that of shovelling, namely, about fifteen cents

per cubic yard. If the dirt has to be tamped in the trench, the cost

will then be that of another man, and backfilling will often add thirty

cents a cubic yard to the cost of excavation.

As a summary, it may be said that excavation alone in earth may cost

from fifteen cents to forty-five cents a cubic yard, and that

backfilling may add to this from five to thirty cents a cubic yard, the

entire cost, therefore, varying from twenty cents to seventy-five cents

a cubic yard for excavation and backfilling together. Nor is it possible

to be more definite in explaining the proper price to put on excavation

since the character of the material and the nature of the excavation are

of such importance in fixing that cost. If the excavation is for a tank,

it is often possible to rig a derrick with a long arm on the side of the

excavation and, by means of a bucket, transfer the excavated material

from the hole to the bank cheaper than by repeated shovelling or by

carrying out the dirt in a wheelbarrow. Wheelbarrow work is always

expensive, the cost of transporting earth in a wheelbarrow a distance of

fifty feet being about ten cents a cubic yard. Sometimes a horse may be

used to great advantage to lift the bucket and operate the derrick in

place of a hand-worked windlass, although the use of the horse is hardly

worth while unless the excavation is more than ten feet deep.

The excavation for the trenches of a sub-surface irrigation system

cannot be estimated on the same basis as for a larger trench. More time

is required proportionally in trimming and grading the sides and bottom,

so that the cost per cubic yard is much increased. Thus, while such

trenches contain about one cubic foot of earth per lineal foot, and on

the basis of twenty-seven cents per yard would cost only one cent per

lineal foot to dig, it is probable that, under ordinary conditions, this

amount would be doubled.

The cost of underdrains must be made up from the cost of the pipe used

and the cost of the necessary excavation. In the bottom of artificial

filter beds, the latter amounts to little or nothing. In natural filter

beds, the trenches are deeper and the cost of the underdrainage depends

largely on this excavation cost. The cost of the pipe varies from two to

ten cents per foot, depending on the kind of pipe used and its unit

cost.

_Rock Excavation._—If the trench or the place for the tank is to be in

rock, the cost of excavation is much increased. The rock must be drilled

and blasting powder or dynamite used to loosen the material so that it

can be thrown out later by hand. In ordinary rock, a man will drill from

six inches to twelve inches of hole per hour, that is, the hole will

cost from ten to twenty cents per lineal foot. The depth of the hole

determines the amount of rock loosened per charge. If the holes are

three feet deep, about one-third of a cubic yard is loosened per hour,

while if the holes are five feet deep, one cubic yard of rock is

loosened per hour. This indicates at once the economical advantage of

deep holes compared with shallow ones. In the first case, nine lineal

feet of hole would have to be drilled in order to get one cubic yard of

rock, nearly double the amount required where the hole is five feet

deep. Usually the distance between the holes is made equal to the depth

of the holes, although in some rock the depth can, with advantage, be

made greater than that distance. If the rock is very loose and seamy,

deep holes may sometimes not be warranted, because the effect of the

blasting is taken up by the loose rock in such a way that the value of

the explosive is not realized. Shallower holes, more frequently blasted,

utilize the explosive gases more completely.

The kind of explosive which may be used varies from slow, low-power

black powder to rapid, high-power nitro-glycerine, the many forms of

dynamite and high-grade powder in use being combinations of

nitro-glycerine with some absorbent. In most cases, ordinary blasting

powder is suitable for rock excavation in small quantity. It lifts the

rock rather than shatters it, and is more convenient and safe to handle.

Forty-per-cent dynamite is to be recommended where the rock is very

seamy so that quick-acting explosive is essential, and also where the

rock is very hard, so that black powder tends to blow out the hole

rather than to shatter the rock. The cost of forty-per-cent dynamite is

about twenty cents per pound, and the cost of powder is about twelve

cents per pound. On the average, it may be assumed that it will require

one pound of the former and one and a half pounds of the latter per

cubic yard of ordinary rock excavated. The cost of lifting the blasted

material out of the trench will be at about the same rate as that of

earth.

_Concrete._—The walls of tanks made of concrete depend for their cost

upon the cost of the material and the cost of the labor involved. It is

usually more economical to use gravel as the basis of the concrete if

any is available, and in order that the product may be of good quality

it is always best to screen this gravel, separating it into sand and

stone. The proper size of screen for this operation should be not

greater than one-half-inch mesh. The stone and sand can then be

re-combined with the cement in the proportion of one part of cement to

two and a half parts of sand to five parts of stone, this mixture making

a very strong and impervious combination. The cost of this mixture

depends chiefly on the length of haul for the gravel and on the natural

grading of the material. If the proportions required for concrete exist

naturally in the bank or stream bed from which the gravel is to be

obtained, there is little or no waste involved in screening, and the

only cost is that of handling the material twice. If, on the other hand,

the amount of stone is inadequate, it may be necessary to waste a good

deal of the fine sand and enough material has to be shovelled to produce

the required amount of coarse media. Assuming that the cost of

shovelling the material from the stream bed is fifteen cents a cubic

yard, and that the haul is two miles, so that four trips a day are made,

then the gravel can be delivered where it is to be converted into

concrete at a cost of one dollar for hauling and thirty cents for

shovelling, while if the haul is only one mile, so that eight trips a

day can be made, the cost will be eighty cents per cubic yard. If any

waste of gravel is necessary, these costs will be increased

correspondingly.

At the site of the proposed plant the sand and gravel must be mixed with

the cement and carried to place. It has been found by experience when

the mixing is done thoroughly and by hand, and when the resulting

concrete can be shovelled directly behind the forms, that the cost of

the mixing and placing is about one dollar per cubic yard of concrete.

If the concrete has to be wheeled into place this cost will be added to.

In order to make a cubic yard of concrete, it is necessary to have

nearly one cubic yard of the coarse material, whether this be rounded

stones from a gravel bank or angular stones from a stone-crusher.

Seven-eighths of a cubic yard of stone may be safely considered as

necessary for a cubic yard of concrete. To this must be added

three-eighths of a cubic yard of sand for a one to two and a half to

five mixture. When this amount of stone and sand have been thoroughly

mixed together, four and a half bags of cement should be added. Inasmuch

as the variation in sizes of the individual particles of rounded gravel

is such that a dense concrete results naturally, it is quite reasonable

both to increase the amount of stone and decrease the amount of cement

if that variation in size seems to be one which will produce a dense

mixture. Thus one cubic yard of stone, one-third cubic yard of sand, and

four bags of cement may be used and will, under favorable conditions,

result in a good concrete. In order to determine whether this latter

combination is permissible on any particular piece of work, a test may

be made by thoroughly mixing the materials together in the proportions

named and testing the volume of this mixture (B) in a box of measured

dimensions. Then the same volumes mixed together in the former

proportions (mixture A), and tested in the same box will show the

relative value by occupying either more or less space than the other

mixture (B). If less, mixture A is a better one, and should be used; if

more, then the latter mixture, B, is the better one.

The amount of water required for mixing concrete depends upon the

temperature of the outside air as well as upon the personal ideas of the

person in charge of the mixing. Some builders like wet concrete and some

like dry concrete. It should be noticed, however, that wet concrete is

cheaper because it requires little or no tamping. Wet concrete, however,

should be spaded, that is, a spade forced down into the mixture,

particularly against the forms, so that particles of air caught between

the stones may escape, and so that there may be no pockets between the

stones into which the liquid cement mixture does not penetrate. It is

generally considered that about fifteen per cent of the volume of

concrete is the necessary volume of water for the mixture. This amounts

to thirty gallons, or a barrel of water, to a yard of concrete, although

the sizes of barrels vary, and a cement barrel would not be large

enough, and a road-oil barrel would be too large.

The cost of forms depends, again, on the cost of material and on the

cost of labor. Rough lumber varies in price from twenty to forty dollars

a thousand feet, board measure, delivered on the grounds, and the cost

of framing and placing it varies from eight to twenty dollars per

thousand, depending on the skill of the carpenters and on their daily

wages. In order to estimate the cost of the lumber required for building

false work, it is best to determine exactly the amount of lumber

required, and get the price from a lumber yard on that quantity.

Ordinarily, it is safe to say that a carpenter in building forms will be

able to saw and nail in place 250 board feet per day, so that, knowing

the amount of lumber to be used and the wages of the carpenter, it will

be easy to determine the cost of the forms as first set up. They may be

taken down and removed for the purpose of re-assembling in another place

for about half the cost of placing originally, and by carefully

arranging to build the forms in panels or sections, they may be removed

by a carpenter at the rate of 4,000 or 5,000 board feet per day.

_Valves._—In connection with a sewage-disposal plant, valves are

essential at many points. At the entrance to the several parts of the

settling tank, flap valves are suitable to admit or keep out sewage from

the several compartments. Gate valves are used on the by-pass lines and

on connecting lines between the tank and the filter beds in order to be

of service when it is occasionally necessary to clean the beds. More

simple valves may be used in manholes where a diversion of the flow is

required and where perfect and complete water-tightness is not

essential. These valves may be made of plank, sliding up and down in

grooves left in the concrete walls for that purpose. Sludge valves may

be made to fit in the bottom of the tank, and depend for their

water-tightness on the weight of the valve itself with the aid of a

rubber packing which is placed between the valve and its setting. The

cost of these various kinds of valves cannot be given exactly, since

their cost depends upon freight and profit of the various commission men

through whom the valves are ordered, but, generally speaking, they will

be found to differ but little from the costs given in the following

table:

TABLE

Flap valve as shown in Fig. 16 $5.00

Gate valve (iron bearings) for 6–inch pipe (Fig. 13) 20.00

Gate valve (bronze bearings) for 6–inch pipe 30.00

Sludge valve as shown in Fig. 10 4.00

Iron slide valve as shown in Fig. 11 15.00

_Dosing Devices._—Dosing devices referred to in Chapter III are usually

purchased directly from the manufacturer, and while their cost varies a

little, depending upon the cost of freight, an ordinary single automatic

siphon may be estimated at $15, the difference in price varying a little

with the different makes of siphon. If an alternate discharge is

required, then two siphons must be installed, by means of which

alternate intermittency is secured, the variation, however, being only

from one to the other and back again to the first. If a plural alternate

discharge is to be used, the cost may be estimated roughly for a 6–inch

siphon at from $50 to $75 for each unit, this price including the

necessary piping but not the cost of setting.

_Filling Material._—Artificial sand filters require a sand of uniform

size and one free from dirt. These two requirements add very materially

to the cost of sand, since it is almost impossible to find a natural

sand which fulfils the necessary requirements. A few sections of the

country are fortunate in having sand in the vicinity suitable for

filtration purposes without any washing or screening. Such parts of the

country, however, are limited to those where sand has been deposited by

glacial action, and is essentially silicious in character. It is

hopeless to expect to find suitable sand in the centre of New York

State, for example, and even with washing and screening, sand in this

locality is far from being desirable. It will be found, further, that

after this undesirable sand is washed and screened the cost of the final

product is so great that it is usually cheaper to use broken stone

either as a filter or as a contact bed.

Washing sand in small quantities is done by throwing the sand into a

channel through which water is passing, the sand being retained by a

series of low partitions in the channel. If the water enters the box or

channel through a pipe at the bottom, frequent entrance holes being

provided along the sides and bottom of this pipe, the sand is kept in a

state of suspension, the dirt more readily washed out, and a much

smaller amount of water used. The cost of shovelling the sand into the

washer and again out of the washer, about thirty cents per cubic yard,

must be added to the original cost of the sand. The cost of water, if

pumped by hand or by steam, will be about ten cents per cubic yard of

sand cleaned, making the total cost about forty cents per cubic yard. If

only three-fourths of the unwashed sand is available for use, then the

cost of the final product is a little less than fifty cents per cubic

yard. The sand before being brought to the washer will have been sifted

at an additional cost of perhaps thirty cents per cubic yard. Hauling

from the bank to the washer, or from the washer to the site of the

disposal works, or both, if the water supply requires the washer to be

placed at some distance from the sand bank, will add from fifty cents to

one dollar a yard to the costs already indicated. It may generally be

assumed that it will be impossible to put sand into an artificial filter

for less than $1.50 a cubic yard, and it may easily cost $2.50 a yard if

the sand bank is at considerable distance from the site of the works.

Broken stone in most parts of the country can now be bought from a

stone-crushing plant. If road construction has been in progress in the

vicinity, the contractor for the work has been obliged to open a quarry

and set up a crushing-and-screening plant, and it will generally be

possible to buy broken stone from such a contractor at about fifty cents

per cubic yard. The cost of hauling and the cost of shovelling into the

beds must be added to determine the cost of the stone in place.

Sometimes it is cheaper to bring the stone from a distance by rail, such

stone costing about $1.25 at the railroad station. Then the cost of

hauling and shovelling must be added. It will be noticed that the cost

of stone does not differ materially from the cost of sand, and since the

amount of stone needed is only about one-quarter of the sand needed, it

is generally cheaper to build a stone bed. The purification, it will be

remembered, however, is decidedly inferior.

_Finishing._—There is always some slight expense necessary in finishing

and cleaning up after any piece of construction work. Material left over

has to be hauled away, and in order to leave the plant in an attractive

dress, seeding or sodding the earth slopes is desirable. It is even

desirable to plant shrubbery around the edges of the beds, partly as a

screen and partly to minimize the offensive suggestions which seem to be

inseparable from any plant dealing with sewage. The cost of these final

improvements may be as little or as much as the owner and builder

chooses, but it is urged that their value should not be overlooked.

The following table is given as a guide and help in putting together the

various items that make up the total cost of a sewage-disposal plant.

Each line should be carefully considered, and if the item mentioned is

to be used or paid for, the amount in the last column should be filled

out.

TABLE OF ITEMS ON WHICH TO BASE ESTIMATE OF COST OF SEWAGE-DISPOSAL

PLANT

═══════════════════════════════════════════════════════════╤═════╤═════

│ No. │Cost

│ of │

│Units│

───────────────────────────────────────────────────────────┼─────┼─────

│ │

_Excavation and Refilling_ │ │

│ │

Trenches in sandy soil, shallow at per cu. yd. │ │

depth │ │

Trenches in stiff soil, shallow at per cu. yd. │ │

depth │ │

Trenches in sandy soil, deep cut at per cu. yd. │ │

Trenches in stiff soil, deep cut at per cu. yd. │ │

Tank, depth and soil duly at per cu. yd. │ │

considered │ │

Beds, depth and soil duly at per cu. yd. │ │

considered │ │

Embankments between filter beds at per cu. yd. │ │

(additional cost) │ │

Trenches for sub-surface lines at per lin. ft. │ │

Trenches for underdrains at per lin. ft. │ │

Trenches for sludge disposal at per lin. ft. │ │

│ │

_Surfacing and Finishing_ │ │

│ │

Surface soil placed at per sq. yd. │ │

Gravel in walks at per sq. yd. │ │

Flowers and shrubbery Total amount │ │

│ │

_Concrete Work_ │ │

Manholes on pipe lines at each │ │

Settling tank, bottom, sides and at per cu.yd. │ │

roof │ │

Dosing tank, in addition to at per cu. yd. │ │

settling tank │ │

Manholes on sub-surface lines at per cu. yd. │ │

Concrete in contact beds or at per cu. yd. │ │

filters │ │

Concrete in protection wall at end at per cu. yd. │ │

of outfall │ │

│ │

_Pipe Lines_ │ │

│ │

5– or 6–inch tile pipe (laid), at per lin. ft. │ │

house to disposal plant │ │

6–inch pipe used in disposal at per lin. ft. │ │

plant, laid │ │

6–inch pipe from plant to outfall at per lin. ft. │ │

6–inch pipe for sludge line at per lin. ft. │ │

6–inch pipe for main underdrain at per lin. ft. │ │

3–inch agricultural tile in at per lin. ft. │ │

sub-surface disposal │ │

4–inch agricultural tile in at per lin. ft. │ │

underdrains │ │

6–inch specials, bends, tees, at each │ │

etc., in addition to cost of │ │

straight pipe │ │

3–inch specials, bends, tees, at each │ │

etc., in addition to cost of │ │

straight pipe │ │

Cast-iron pipe at per lb. │ │

Cast-iron specials, bends, etc. at per lb. │ │

Wooden troughs for surface at per 1000 ft. B.M.│ │

distribution, in place │ │

│ │

_Filter Material_ │ │

│ │

Gravel filling around sub-surface at per cu. yd. │ │

tile, placed │ │

Sand filling for artificial filter at per cu. yd. │ │

beds │ │

Broken stone for contact beds or at per cu. yd. │ │

for filters │ │

Broken stone for sludge beds at per cu. yd. │ │

│ │

_Valves_ │ │

│ │

Gate valves, Fig. 13 at each │ │

Flap valves, Fig. 16 at each │ │

Slide valves, Fig. 11 at each │ │

Wooden slide valves at each │ │

Sludge valves, Fig. 10 at each │ │

│ │

_Tools_ │ │

│ │

Shovels, long or short handled at each │ │

Picks at each │ │

Wheelbarrows, wooden or steel at each │ │

Sieves for screening sand and at each │ │

gravel │ │

Saws, hammers, and axes Total amount │ │

│ │

_Lumber_ │ │

│ │

For sheeting and bracing; rough at per 1000 ft. B.M.│ │

lumber │ │

For forms for concrete work, sized at per 1000 ft. B.M.│ │

For runways, staging and mixing at per 1000 ft. B.M.│ │

boards, plank │ │

│ │

_Hardware_ │ │

│ │

Nails for forms, staging, etc. at per 100 lbs. │ │

Bolts or wire for concrete forms at per lb. │ │

│ │

_Iron Work_ │ │

│ │

Manhole frames and covers at per lb. │ │

Steps for manholes at per lb. │ │

│ │

_Siphons_ │ │

│ │

Flushing siphons for dosing tank at complete │ │

Timed siphons for emptying contact at complete │ │

beds │ │

│—————│—————

Total │ │

───────────────────────────────────────────────────────────┴─────┴─────

_Cost of Maintenance._—As to the cost of maintenance, very little that

is definite can be said. Sub-surface irrigation plants should require no

expenditure except for the occasional cleaning of the sedimentation

tank. If this is emptied three times a year, the labor needed would

amount to about a half-day’s time on each occasion for a family of

ordinary size. For sand filters, either natural or artificial, the tank

must be emptied as with sub-surface irrigation, and, in addition, the

surface must be scraped occasionally, and at the approach of winter

furrows must be dug. Perhaps two days’ time would be all that would be

needed for a plant dealing with the sewage of a single family. A

broken-stone bed requires no attention for seven or eight years, and

then the stone has to be shovelled out, washed, and replaced.

In none of the installations is this excessive in comparison with the

benefits received, and it should not be considered a burden to expend

this amount of time in maintaining so important a part of the household

economy as the disposal of the household wastes in a sanitary manner. It

must not be forgotten, however, that no sewage-disposal plant is exempt

from occasional break-down or accidents, and that there must be a

constant supervision exercised. This supervision should not require much

more time than above suggested, but should be exercised for the purpose

of correcting irregular flows or distribution before the value of the

plant is utterly destroyed.

INDEX

Bacteria, action of, in reducing organic matter and sewage, 6

Baffle boards in settling tank, 30

Broad irrigation, 98

areas, maintenance of, 108

methods of applying sewage in, 104

sewage disposal by, area required, 102

when advisable, 110

Clay soils for sewage purification, 9

Cleaning settling tanks, 32

Composition of sewage, 4

Concrete for walls and floors of settling tanks, 24

walls, forms for constructing, 22

Contact beds, 87

alternating flow to, 89

general features of construction of, 89

principles involved, 88

table for use in constructing, 92

underdrainage of, 89

Cost items of sewage-disposal plant, table on which to base estimates,

125

Cost of broken stone, 124

of concrete, 119

of dosing devices or siphons, 122

of excavating and refilling, 115

of finishing and cleaning up, 124

of forms for concrete walls, 121

of laying sewers and drains, 113

of maintaining sewage-disposal plants, 127

of material, 113

for filter beds, 123

of rock excavation, 117

of sand, 114

of sewage-disposal plants, 112

of valves, 122

Crops, yield of, with and without sewage irrigation, 103

Disease, transmission of, by insects, 1

Dosing apparatus, Ansonia automatic, 43

three kinds of, 53

Drain pipe from settling tank, 26

Emscher or Imhoff tanks, 34

Excavation for settling tanks, 25

Fertilizing elements in sewage, value of, 98

Forms for building settling tanks, 22

Grease traps in connection with sand filters, 78

Imhoff or Emscher tanks, 34

Irrigation, amount of water necessary for, 101

of orchards, 108

value of sewage for, 99

Laws against disposal of sewage into streams, 3

Manholes through settling-tank roof, 29

Overflow pipe from siphon chamber, 31

Roof of settling tank, construction of, 27

Sand filters, alternating flow of effluent to different beds composing,

83

artificially constructed, 79

details of construction of, 74

devices for dosing, 82

distribution of effluent over, 78

preparation for winter of, 84

quality of sand suitable for, 86

scraping surface of, 84

settling of sewage before application to, 77

table for use in constructing, 76

underdrainage of, 81

Sand filtration, 74

Screening of sewage, 5

Settling-tank floors, necessary slope of, 26

tanks compared with septic tanks, 11

construction of floors of, 25

description of, 16

dimensions for, 18

function of, 14

location of, 20

near sub-surface irrigation field, 31

materials for and construction of, 20

operation of, 32

partial treatment only provided by, 16

water-tight, construction of, 24

Sewage, composition and character of, 4

disposal—an engineering problem, 1

Sewage disposal:

by dilution, 3

in soils, three essential conditions for, 8

need of, 2

plants, permissible rates of operation of, 8

preliminary and final methods of, 11

Sewage filters, 73

proper operation necessary to success of, 96

relative efficiency of various types of, 73

Sewer, size and gradient of effluent, 63, 77

Siphon chamber, depth of sewage in, 38

Siphon chambers, 21, 60

necessity for, 37

Siphon, Miller, 45

simplest form of, 44

Van Vranken, 44

Siphons, alternating air-lock, 52

discharging depth or draught of, 77

for automatic discharge of sewage effluent, 42

how to place, in position, 25, 64, 77

Merritt, 50

placing two in one chamber for alternating flow, 47

plural alternating, 48

sketches of and directions for setting furnished by manufacturers of,

53

Size of dose in disposal plants, 10

Sludge pipe from settling tank, 27

Soils and their suitability in purifying sewage, 7

Sprinkling filters, 93

construction and operation of, 94

Sub-surface irrigation, conditions favorable to, 71

description of, 55

fields, location of, 58

soils suitable for, 57

special advantages of, for country home, 57

system—advantages over cesspools, 56

systems, alternate use of different portions of, 68

details of construction of, 58, 63

value of underdrainage in, 69

tables for use in constructing, 59

underdrains for, 69

Sub-surface tiling, depth below ground surface of, 67

gradient or fall of, 67

how to lay, 64

necessary length of, 66

Timed siphons for discharging contact beds, 91

Valves, English slide, 40

flap attached to sewer pipe, 41

with loose-link hinges, 42

with metallic seat, 41

hand, 39

ordinary gate, 40

sluice gate, 40

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* Thames River Bridge Oblong 5 00

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Burr and Falk’s Design and Construction of Metallic 8vo, 5 00

Bridges

Influence Lines for Bridge and Roof Computations 8vo, 3 00

Du Bois’s Mechanics of Engineering. Vol. II Small 4to, 10 00

Foster’s Treatise on Wooden Trestle Bridges 4to, 5 00

Fowler’s Ordinary Foundations 8vo, 3 50

Greene’s Arches in Wood, Iron, and Stone 8vo, 2 50

Bridge Trusses 8vo, 2 50

Roof Trusses 8vo, 1 25

Grimm’s Secondary Stresses in Bridge Trusses 8vo, 2 50

Heller’s Stresses in Structures and the Accompanying 8vo, 3 00

Deformations

Howe’s Design of Simple Roof-trusses in Wood and 8vo, 2 00

Steel

Symmetrical Masonry Arches 8vo, 2 50

Treatise on Arches 8vo, 4 00

* Hudson’s Deflections and Statically Indeterminate Small 4to, 3 50

Stresses

* Plate Girder Design 8vo, 1 50

* Jacoby’s Structural Details, or Elements of Design 8vo, 2 25

in Heavy Framing

Johnson, Bryan and Turneaure’s Theory and Practice in Small 4to, 10 00

the Designing of Modern Framed Structures

* Johnson, Bryan and Turneaure’s Theory and Practice 8vo, 3 00

in the Designing of Modern Framed Structures. New

Edition. Part I.

* Part II. New Edition 8vo, 4 00

Merriman and Jacoby’s Text-book on Roofs and Bridges:

Part I. Stresses in Simple Trusses 8vo, 2 50

Part II. Graphic Statics 8vo, 2 50

Part III. Bridge Design 8vo, 2 50

Part IV. Higher Structures 8vo, 2 50

Ricker’s Design and Construction of Roofs. (In

Press.)

Sondericker’s Graphic Statics, with Applications to 8vo, 2 00

Trusses, Beams, and Arches

Waddell’s De Pontibus, Pocket-book for Bridge 16mo, mor. 2 00

Engineers

* Specifications for Steel Bridges 12mo, 50

Waddell and Harrington’s Bridge Engineering. (In

Preparation.)

HYDRAULICS.

Barnes’s Ice Formation 8vo, 3 00

Bazin’s Experiments upon the Contraction of the 8vo, 2 00

Liquid Vein Issuing from an Orifice. (Trautwine.)

Bovey’s Treatise on Hydraulics 8vo, 5 00

Church’s Diagrams of Mean Velocity of Water in Open Oblong 4to, 1 50

Channels. paper,

Hydraulic Motors 8vo, 2 00

Mechanics of Fluids (Being Part IV of Mechanics 8vo, 3 00

of Engineering)

Coffin’s Graphical Solution of Hydraulic Problems 16mo, mor. 2 50

Flather’s Dynamometers, and the Measurement of Power 12mo, 3 00

Folwell’s Water-supply Engineering 8vo, 4 00

Frizell’s Water-power 8vo, 5 00

Fuertes’s Water and Public Health 12mo, 1 50

Water-filtration Works 12mo, 2 50

Ganguillet and Kutter’s General Formula for the 8vo, 4 00

Uniform Flow of Water in Rivers and Other Channels.

(Hering and Trautwine.)

Hazen’s Clean Water and How to Get It Large 12mo, 1 50

Filtration of Public Water-supplies 8vo, 3 00

Hazelhurst’s Towers and Tanks for Water-works 8vo, 2 50

Herschel’s 115 Experiments on the Carrying Capacity 8vo, 2 00

of Large, Riveted, Metal Conduits

Hoyt and Grover’s River Discharge 8vo, 2 00

Hubbard and Kiersted’s Water-works Management and 8vo, 4 00

Maintenance

* Lyndon’s Development and Electrical Distribution of 8vo, 3 00

Water Power

Mason’s Water-supply. (Considered Principally from a 8vo, 4 00

Sanitary Standpoint.)

* Merriman’s Treatise on Hydraulics. 9th Edition, 8vo, 4 00

Rewritten

* Molitor’s Hydraulics of Rivers, Weirs and Sluices 8vo, 2 00

* Morrison and Brodie’s High Masonry Dam Design 8vo, 1 50

* Richards’s Laboratory Notes on Industrial Water 8vo, 50

Analysis

Schuyler’s Reservoirs for Irrigation, Water-power, Large 8vo, 6 00

and Domestic Water-supply. Second Edition, Revised

and Enlarged

* Thomas and Watt’s Improvement of Rivers 4to, 6 00

Turneaure and Russell’s Public Water-supplies 8vo, 5 00

* Wegmann’s Design and Construction of Dams 6th Ed., 4to, 6 00

enlarged

Water-Supply of the City of New York from 1658 4to, 10 00

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Whipple’s Value of Pure Water Large 12mo, 1 00

Williams and Hazen’s Hydraulic Tables 8vo, 1 50

Wilson’s Irrigation Engineering 8vo, 4 00

Wood’s Turbines 8vo, 2 50

MATERIALS OF ENGINEERING.

Baker’s Roads and Pavements 8vo, 5 00

Treatise on Masonry Construction 8vo, 5 00

Black’s United States Public Works Oblong 4to, 5 00

* Blanchard and Drowne’s Highway Engineering, as 8vo, 2 00

Presented at the Second International Road

Congress, Brussels, 1910

Bleininger’s Manufacture of Hydraulic Cement. (In

Preparation.)

* Bottler’s German and American Varnish Making. Large 12mo, 3 50

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Burr’s Elasticity and Resistance of the Materials of 8vo, 7 50

Engineering

Byrne’s Highway Construction 8vo, 5 00

Inspection of the Materials and Workmanship 16mo, 3 00

Employed in Construction

Church’s Mechanics of Engineering 8vo, 6 00

Mechanics of Solids (Being Parts I, II, III of 8vo, 4 50

Mechanics of Engineering)

Du Bois’s Mechanics of Engineering

Vol. I. Kinematics, Statics, Kinetics Small 4to, 7 50

Vol. II. The Stresses in Framed Structures, Small 4to, 10 00

Strength of Materials and Theory of Flexures

* Eckel’s Building Stones and Clays 8vo, 3 00

* Cements, Limes, and Plasters 8vo, 6 00

Fowler’s Ordinary Foundations 8vo, 3 50

* Greene’s Structural Mechanics 8vo, 2 50

Holley’s Analysis of Paint and Varnish Products. (In

Press.)

* Lead and Zinc Pigments Large 12mo, 3 00

* Hubbard’s Dust Preventives and Road Binders 8vo, 3 00

Johnson’s (C. M.) Rapid Methods for the Chemical Large 12mo, 3 00

Analysis of Special Steels, Steel-making Alloys and

Graphite

Johnson’s (J. B.) Materials of Construction Large 8vo, 6 00

Keep’s Cast Iron 8vo, 2 50

Lanza’s Applied Mechanics 8vo, 7 50

Lowe’s Paints for Steel Structures 12mo, 1 00

Maire’s Modern Pigments and their Vehicle 12mo, 2 00

* Martin’s Text Book on Mechanics. Vol. I. Statics 12mo, 1 25

* Vol. II. Kinematics and Kinetics 12mo, 1 50

* Vol. III. Mechanics of Materials 12mo, 1 50

Maurer’s Technical Mechanics 8vo, 4 00

Merrill’s Stones for Building and Decoration 8vo, 5 00

Merriman’s Mechanics of Materials 8vo, 5 00

* Strength of Materials 12mo, 1 00

Metcalf’s Steel. A Manual for Steel-users 12mo, 2 00

Morrison’s Highway Engineering 8vo, 2 50

* Murdock’s Strength of Materials 12mo, 2 00

Patton’s Practical Treatise on Foundations 8vo, 5 00

Rice’s Concrete Block Manufacture 8vo, 2 00

Richardson’s Modern Asphalt Pavement 8vo, 3 00

Richey’s Building Foreman’s Pocket Book and Ready 16mo, mor. 5 00

Reference

* Cement Workers’ and Plasterers’ Edition 16mo, mor. 1 50

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Handbook for Superintendents of Construction 16mo, mor. 4 00

* Stone and Brick Masons’ Edition (Building 16mo, mor. 1 50

Mechanics’ Ready Reference Series)

* Ries’s Clays: Their Occurrence, Properties, and 8vo, 5 00

Uses

* Ries and Leighton’s History of the Clay-working 8vo. 2 50

Industry of the United States

Sabin’s Industrial and Artistic Technology of Paint 8vo, 3 00

and Varnish

* Smith’s Strength of Material 12mo, 1 25

Snow’s Principal Species of Wood 8vo, 3 50

Spalding’s Hydraulic Cement 12mo, 2 00

Text-book on Roads and Pavements 12mo, 2 00

* Taylor and Thompson’s Concrete Costs Small 8vo, 5 00

* Extracts on Reinforced Concrete Design 8vo, 2 00

Treatise on Concrete, Plain and Reinforced 8vo, 5 00

Thurston’s Materials of Engineering. In Three Parts 8vo, 8 00

Part I. Non-metallic Materials of Engineering 8vo, 2 00

and Metallurgy

Part II. Iron and Steel 8vo, 3 50

Part III. A Treatise on Brasses, Bronzes, and 8vo, 2 50

Other Alloys and their Constituents

Tillson’s Street Pavements and Paving Materials 8vo, 4 00

Turneaure and Maurer’s Principles of Reinforced 8vo, 3 50

Concrete Construction. Second Edition, Revised and

Enlarged

Waterbury’s Cement Laboratory Manual 12mo, 1 00

* Laboratory Manual for Testing Materials of 12mo, 1 50

Construction

Wood’s (De V.) Treatise on the Resistance of 8vo, 2 00

Materials, and an Appendix on the Preservation of

Timber

Wood’s (M. P.) Rustless Coatings: Corrosion and 8vo, 4 00

Electrolysis of Iron and Steel

RAILWAY ENGINEERING.

Andrews’s Handbook for Street Railway Engineers 3 × 5 1 25

inches,

mor.

Berg’s Buildings and Structures of American Railroads 4to, 5 00

Brooks’s Handbook of Street Railroad Location 16mo, mor. 1 50

* Burt’s Railway Station Service 12mo, 2 00

Butts’s Civil Engineer’s Field-book 16mo, mor. 2 50

Crandall’s Railway and Other Earthwork Tables 8vo, 1 50

Crandall and Barnes’s Railroad Surveying 16mo, mor. 2 00

* Crockett’s Methods for Earthwork Computations 8vo, 1 50

Dredge’s History of the Pennsylvania Railroad. (1879) Paper. 5 00

Fisher’s Table of Cubic Yards Cardboard, 25

Godwin’s Railroad Engineers’ Field-book and 16mo, mor. 2 50

Explorers’ Guide

Hudson’s Tables for Calculating the Cubic Contents of 8vo, 1 00

Excavations and Embankments

Ives and Hilts’s Problems in Surveying, Railroad 16mo, mor. 1 50

Surveying and Geodesy

Molitor and Beard’s Manual for Resident Engineers 16mo, 1 00

Nagle’s Field Manual for Railroad Engineers 16mo, mor. 3 00

* Orrock’s Railroad Structures and Estimates 8vo, 3 00

Philbrick’s Field Manual for Engineers 16mo, mor. 3 00

Raymond’s Railroad Field Geometry 16mo, mor. 2 00

Elements of Railroad Engineering 8vo, 3 50

Railroad Engineer’s Field Book. (In

Preparation.)

Roberts’ Track Formulæ and Tables 16mo. mor. 3 00

Searles’s Field Engineering 16mo, mor. 3 00

Railroad Spiral 16mo, mor. 1 50

Taylor’s Prismoidal Formulæ and Earthwork 8vo, 1 50

Webb’s Economics of Railroad Construction Large 12mo, 2 50

Railroad Construction 16mo, mor. 5 00

Wellington’s Economic Theory of the Location of Large 12mo, 5 00

Railways

Wilson’s Elements of Railroad-Track and Construction 12mo, 2 00

DRAWING

Barr and Wood’s Kinematics of Machinery 8vo, 2 50

* Bartlett’s Mechanical Drawing 8vo, 3 00

* Bartlett’s Mechanical Drawing Abridged Ed. 8vo, 1 50

* Bartlett and Johnson’s Engineering Descriptive 8vo, 1 50

Geometry

Blessing and Darling’s Descriptive Geometry. (In

Press.)

Elements of Drawing. (In Press.)

Coolidge’s Manual of Drawing 8vo, paper, 1 00

Coolidge and Freeman’s Elements of General Drafting Oblong 4to, 2 50

for Mechanical Engineers

Durley’s Kinematics of Machines 8vo, 4 00

Emch’s Introduction to Projective Geometry and its 8vo, 2 50

Application

Hill’s Text-book on Shades and Shadows, and 8vo, 2 00

Perspective

Jamison’s Advanced Mechanical Drawing 8vo, 2 00

Elements of Mechanical Drawing 8vo, 2 50

Jones’s Machine Design:

Part I. Kinematics of Machinery 8vo, 1 50

Part II. Form, Strength, and Proportions of 8vo, 3 00

Parts

* Kimball and Barr’s Machine Design 8vo, 3 00

MacCord’s Elements of Descriptive Geometry 8vo, 3 00

Kinematics; or, Practical Mechanism 8vo, 5 00

Mechanical Drawing 4to, 4 00

Velocity Diagrams 8vo, 1 50

McLeod’s Descriptive Geometry Large 12mo, 1 50

* Mahan’s Descriptive Geometry and Stone-cutting 8vo, 1 50

Industrial Drawing. (Thompson.) 8vo, 3 50

Moyer’s Descriptive Geometry 8vo, 2 00

Reed’s Topographical Drawing and Sketching 4to, 5 00

* Reid’s Mechanical Drawing. (Elementary and 8vo, 2 00

Advanced.)

Text-book of Mechanical Drawing and Elementary 8vo, 3 00

Machine Design

Robinson’s Principles of Mechanism 8vo, 3 00

Schwamb and Merrill’s Elements of Mechanism 8vo, 3 00

Smith (A. W.) and Marx’s Machine Design 8vo, 3 00

Smith’s (R. S.) Manual of Topographical Drawing. 8vo, 2 50

(McMillan.)

* Titsworth’s Elements of Mechanical Drawing Oblong 8vo, 1 25

Tracy and North’s Descriptive Geometry. (In Press.)

Warren’s Elements of Descriptive Geometry, Shadows, 8vo, 3 50

and Perspective

Elements of Machine Construction and Drawing 8vo, 7 50

Elements of Plane and Solid Free-hand 12mo, 1 00

Geometrical Drawing

General Problems of Shades and Shadows 8vo, 3 00

Manual of Elementary Problems in the Linear 12mo, 1 00

Perspective of Forms and Shadow

Manual of Elementary Projection Drawing 12mo, 1 50

Plane Problems in Elementary Geometry 12mo, 1 25

Weisbach’s Kinematics and Power of Transmission. 8vo, 5 00

(Hermann and Klein.)

Wilson’s (H. M.) Topographic Surveying 8vo, 3 50

* Wilson’s (V. T.) Descriptive Geometry 8vo, 1 50

Free-hand Lettering 8vo, 1 00

Free-hand Perspective 8vo, 2 50

Woolf’s Elementary Course in Descriptive Geometry Large 8vo, 3 00

ELECTRICITY AND PHYSICS.

* Abegg’s Theory of Electrolytic Dissociation, (von 12mo, 1 25

Ende.)

Andrews’s Hand-book for Street Railway Engineers 3 × 5 1 25

inches mor.

Anthony and Ball’s Lecture-notes on the Theory of 12mo, 1 00

Electrical Measurements

Anthony and Brackett’s Text-book of Physics. (Magie.) Large 12mo, 3 00

Benjamin’s History of Electricity 8vo, 3 00

Betts’s Lead Refining and Electrolysis 8vo, 4 00

* Burgess and Le Chatelier’s Measurement of High 8vo, 4 00

Temperatures. Third Edition

Classen’s Quantitative Chemical Analysis by 8vo, 3 00

Electrolysis. (Boltwood.)

* Collins’s Manual of Wireless Telegraphy and 12mo, 1 50

Telephony

Crehore and Squier’s Polarizing Photo-chronograph 8vo, 3 00

* Danneel’s Electrochemistry. (Merriam.) 12mo, 1 25

Dawson’s “Engineering” and Electric Traction Pocket 16mo, mor. 5 00

book

Dolezalek’s Theory of the Lead Accumulator (Storage 12mo, 2 50

Battery). (von Ende.)

Duhem’s Thermodynamics and Chemistry. (Burgess.) 8vo, 4 00

Flather’s Dynamometers, and the Measurement of Power 12mo, 3 00

* Getman’s Introduction to Physical Science 12mo, 1 50

Gilbert’s De Magnete. (Mottelay) 8vo, 2 50

* Hanchett’s Alternating Currents 12mo, 1 00

Hering’s Ready Reference Tables (Conversion Factors) 16mo, mor. 2 50

* Hobart and Ellis’s High-speed Dynamo Electric 8vo, 6 00

Machinery

Holman’s Precision of Measurements 8vo, 2 00

Telescope—Mirror-scale Method, Adjustments, and 8vo, 0 75

Tests. Large

* Hutchinson’s High-Efficiency Electrical Illuminants Large 12mo, 2 50

and Illumination

* Jones’s Electric Ignition 8vo, 4 00

Karapetoff’s Experimental Electrical Engineering:

* Vol. I. 8vo, 3 50

* Vol. II. 8vo, 2 50

Kinzbrunner’s Testing of Continuous-current Machines 8vo, 2 00

Landauer’s Spectrum Analysis. (Tingle.) 8vo, 3 00

Lob’s Electrochemistry of Organic Compounds. 8vo, 3 00

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* Lyndon’s Development and Electrical Distribution of 8vo, 3 00

Water Power

* Lyons’s Treatise on Electromagnetic Phenomena. 8vo, each, 6 00

Vols. I. and II.

* Michie’s Elements of Wave Motion Relating to Sound 8vo, 4 00

and Light

* Morgan’s Physical Chemistry for Electrical 12mo, 1 50

Engineers

* Norris’s Introduction to the Study of Electrical 8vo, 2 50

Engineering

Norris and Dennison’s Course of Problems on the

Electrical Characteristics of Circuits and

Machines. (In Press.)

* Parshall and Hobart’s Electric Machine Design 4to, half 12 50

mor.

Reagan’s Locomotives: Simple, Compound, and Electric. Large 12mo, 3 50

New Edition

* Rosenberg’s Electrical Engineering. (Haldane 8vo, 2 00

Gee—Kinzbrunner.)

* Ryan’s Design of Electrical Machinery:

* Vol. I. Direct Current Dynamos 8vo, 1 50

Vol. II. Alternating Current Transformers. (In

Press.)

Vol. III. Alternators, Synchronous Motors, and

Rotary Convertors. (In Preparation.)

Ryan, Norris, and Hoxie’s Text Book of Electrical 8vo, 2 50

Machinery

Schapper’s Laboratory Guide for Students in Physical 12mo, 1 00

Chemistry

* Tillman’s Elementary Lessons in Heat 8vo, 1 50

* Timbie’s Elements of Electricity Large 12mo, 2 00

* Answers to Problems in Elements of Electricity 12mo, Paper 0 25

Tory and Pitcher’s Manual of Laboratory Physics Large 12mo, 2 00

Ulke’s Modern Electrolytic Copper Refining 8vo, 3 00

* Waters’s Commercial Dynamo Design 8vo, 2 00

LAW.

* Brennan’s Hand-book of Useful Legal Information for 16mo, mor. 5 00

Business Men

* Davis’s Elements of Law 8vo, 2 50

* Treatise on the Military Law of United States 8vo, 7 00

* Dudley’s Military Law and the Procedure of Large 12mo, 2 50

Courts-martial

Manual for Courts-martial 16mo, mor. 1 50

Wait’s Engineering and Architectural Jurisprudence 8vo, 6 00

Sheep, 6 50

Law of Contracts 8vo, 3 00

Law of Operations Preliminary to Construction in 8vo, 5 00

Engineering and Architecture

Sheep, 5 50

MATHEMATICS.

Baker’s Elliptic Functions 8vo, 1 50

Briggs’s Elements of Plane Analytic Geometry. 12mo, 1 00

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* Buchanan’s Plane and Spherical Trigonometry 8vo, 1 00

Byerly’s Harmonic Functions 8vo, 1 00

Chandler’s Elements of the Infinitesimal Calculus 12mo, 2 00

* Coffin’s Vector Analysis 12mo, 2 50

Compton’s Manual of Logarithmic Computations 12mo, 1 50

* Dickson’s College Algebra Large 12mo, 1 50

* Introduction to the Theory of Algebraic Large 12mo, 1 25

Equations

Emch’s Introduction to Projective Geometry and its 8vo, 2 50

Application

Fiske’s Functions of a Complex Variable 8vo, 1 00

Halsted’s Elementary Synthetic Geometry 8vo, 1 50

Elements of Geometry 8vo, 1 75

* Rational Geometry 12mo, 1 50

Synthetic Projective Geometry 8vo, 1 00

* Hancock’s Lectures on the Theory of Elliptic 8vo, 5 00

Functions

Hyde’s Grassmann’s Space Analysis 8vo, 1 00

* Johnson’s (J. B.) Three-place Logarithmic Tables: Vest-pocket 0 15

size,

paper,

* 100 5 00

copies,

* Mounted 0 25

on heavy

cardboard,

8 × 10

inches,

* 10 2 00

copies,

Johnson’s (W. W.) Abridged Editions of Differential Large 12mo, 2 50

and Integral Calculus 1 vol.

Curve Tracing in Cartesian Co-ordinates 12mo, 1 00

Differential Equations 8vo, 1 00

Elementary Treatise on Differential Calculus Large 12mo, 1 50

Elementary Treatise on the Integral Calculus Large 12mo, 1 50

* Theoretical Mechanics 12mo, 3 00

Theory of Errors and the Method of Least Squares 12mo, 1 50

Treatise on Differential Calculus Large 12mo, 3 00

Treatise on the Integral Calculus Large 12mo, 3 00

Treatise on Ordinary and Partial Differential Large 12mo, 3 50

Equations

Karapetoff’s Engineering Applications of Higher

Mathematics:

* Part I. Problems on Machine Design Large 12mo, 0 75

Koch’s Practical Mathematics. (In Press.)

Laplace’s Philosophical Essay on Probabilities. 12mo, 2 00

(Truscott and Emory.)

* Le Messurier’s Key to Professor W. W. Johnson’s Small 8vo, 1 75

Differential Equations

* Ludlow’s Logarithmic and Trigonometric Tables 8vo, 1 00

* Ludlow and Bass’s Elements of Trigonometry and 8vo, 3 00

Logarithmic and Other Tables

* Trigonometry and Tables published separately Each, 2 00

Macfarlane’s Vector Analysis and Quaternions 8vo, 1 00

McMahon’s Hyperbolic Functions 8vo, 1 00

Manning’s Irrational Numbers and their Representation 12mo, 1 25

by Sequences and Series

* Martin’s Text Book on Mechanics. Vol. I. Statics 12mo, 1 25

* Vol. II. Kinematics and Kinetics 12mo, 1 50

* Vol. III. Mechanics of Materials 12mo, 1 50

Mathematical Monographs. Edited by Mansfield Merriman Octavo, 1 00

and Robert S. Woodward each

No. 1. History of Modern Mathematics, by David

Eugene Smith. No. 2. Synthetic Projective

Geometry, by George Bruce Halsted. No. 3.

Determinants, by Laenas Gifford Weld. No. 4.

Hyperbolic Functions, by James McMahon. No. 6.

Harmonic Functions. by William E. Byerly. No.

6. Grassmann’s Space Analysis, by Edward W.

Hyde. No. 7. Probability and Theory of Errors,

by Robert S. Woodward. No. 8. Vector Analysis

and Quaternions, by Alexander Macfarlane. No.

9. Differential Equations, by William Woolsey

Johnson. No. 10. The Solution of Equations, by

Mansfield Merriman. No. 11. Functions of a

Complex Variable, by Thomas S. Fiske

Maurer’s Technical Mechanics 8vo, 4 00

Merriman’s Method of Least Squares 8vo, 2 00

Solution of Equations 8vo, 1 00

* Moritz’s Elements of Plane Trigonometry 8vo, 2 00

Rice and Johnson’s Differential and Integral Large 12mo, 1 50

Calculus. 2 vols. in one

Elementary Treatise on the Differential Calculus Large 12mo, 3 00

Smith’s History of Modern Mathematics 8vo, 1 00

* Veblen and Lennes’s Introduction to the Real 8vo, 2 00

Infinitesimal Analysis of One Variable

* Waterbury’s Vest Pocket Hand-book of Mathematics 2⅜ × 5⅜ 1 00

for Engineers inches,

mor.

* Enlarged Edition, Including Tables mor. 1 50

Weld’s Determinants 8vo, 1 00

Wood’s Elements of Co-ordinate Geometry 8vo, 2 00

Woodward’s Probability and Theory of Errors 8vo, 1 00

MECHANICAL ENGINEERING.

MATERIALS OF ENGINEERING, STEAM-ENGINES AND BOILERS.

Bacon’s Forge Practice 12mo, 1 50

Baldwin’s Steam Heating for Buildings 12mo, 2 50

Barr and Wood’s Kinematics of Machinery 8vo, 2 50

* Bartlett’s Mechanical Drawing 8vo, 3 00

* Bartlett’s Mechanical Drawing Abridged Ed. 8vo, 1 50

* Bartlett and Johnson’s Engineering Descriptive 8vo, 1 50

Geometry

* Burr’s Ancient and Modern Engineering and the 8vo, 3 50

Isthmian Canal

Carpenter’s Heating and Ventilating Buildings 8vo, 4 00

* Carpenter and Diederichs’s Experimental Engineering 8vo, 6 00

* Clerk’s The Gas, Petrol and Oil Engine 8vo, 4 00

Compton’s First Lessons in Metal Working 12mo, 1 50

Compton and De Groodt’s Speed Lathe 12mo, 1 50

Coolidge’s Manual of Drawing 8vo, paper, 1 00

Coolidge and Freeman’s Elements of General Drafting Oblong 4to, 2 50

for Mechanical Engineers

Cromwell’s Treatise on Belts and Pulleys 12mo, 1 50

Treatise on Toothed Gearing 12mo, 1 50

Dingey’s Machinery Pattern Making 12mo, 2 00

Durley’s Kinematics of Machines 8vo, 4 00

Flanders’s Gear-cutting Machinery Large 12mo, 3 00

Flather’s Dynamometers and the Measurement of Power 12mo, 3 00

Rope Driving 12mo, 2 00

Gill’s Gas and Fuel Analysis for Engineers 12mo, 1 25

Goss’s Locomotive Sparks 8vo, 2 00

* Greene’s Pumping Machinery 8vo, 4 00

Hering’s Ready Reference Tables (Conversion Factors) 16mo, mor. 2 50

* Hobart and Ellis’s High Speed Dynamo Electric 8vo, 6 00

Machinery

Hutton’s Gas Engine 8vo, 5 00

Jamison’s Advanced Mechanical Drawing 8vo, 2 00

Elements of Mechanical Drawing 8vo, 2 50

Jones’s Gas Engine 8vo, 4 00

Machine Design:

Part I. Kinematics of Machinery 8vo, 1 50

Part II. Form, Strength, and Proportions of 8vo, 3 00

Parts

* Kaup’s Machine Shop Practice Large 12mo, 1 25

* Kent’s Mechanical Engineer’s Pocket-Book 16mo, mor. 5 00

Kerr’s Power and Power Transmission 8vo, 2 00

* Kimball and Barr’s Machine Design 8vo, 3 00

* King’s Elements of the Mechanics of Materials and 8vo, 2 50

of Power of Transmission

* Lanza’s Dynamics of Machinery 8vo, 2 50

Leonard’s Machine Shop Tools and Methods 8vo, 4 00

* Levin’s Gas Engine 8vo, 4 00

* Lorenz’s Modern Refrigerating Machinery. (Pope, 8vo, 4 00

Haven, and Dean)

MacCord’s Kinematics; or, Practical Mechanism 8vo, 5 00

Mechanical Drawing 4to, 4 00

Velocity Diagrams 8vo, 1 50

MacFarland’s Standard Reduction Factors for Gases 8vo, 1 50

Mahan’s Industrial Drawing. (Thompson.) 8vo, 3 50

Mehrtens’s Gas Engine Theory and Design Large 12mo, 2 50

Miller, Berry, and Riley’s Problems in Thermodynamics 8vo, paper, 0 75

and Heat Engineering

Oberg’s Handbook of Small Tools Large 12mo, 2 50

* Parshall and Hobart’s Electric Machine Design. Small 4to, 12 50

half

leather,

* Peele’s Compressed Air Plant. Second Edition, 8vo, 3 50

Revised and Enlarged

* Perkins’s Introduction to General Thermodynamics 12mo. 1 50

Poole’s Calorific Power of Fuels 8vo, 3 00

* Porter’s Engineering Reminiscences, 1855 to 1882 8vo, 3 00

Randall’s Treatise on Heat. (In Press.)

* Reid’s Mechanical Drawing. (Elementary and 8vo, 2 00

Advanced.)

Text-book of Mechanical Drawing and Elementary 8vo, 3 00

Machine Design

Richards’s Compressed Air 12mo, 1 50

Robinson’s Principles of Mechanism 8vo, 3 00

Schwamb and Merrill’s Elements of Mechanism 8vo, 3 00

Smith (A. W.) and Marx’s Machine Design 8vo, 3 00

Smith’s (O.) Press-working of Metals 8vo, 3 00

Sorel’s Carbureting and Combustion in Alcohol Large 12mo, 3 00

Engines. (Woodward and Preston.)

Stone’s Practical Testing of Gas and Gas Meters 8vo, 3 50

Thurston’s Animal as a Machine and Prime Motor, and 12mo, 1 00

the Laws of Energetics

Treatise on Friction and Lost Work in Machinery 8vo, 3 00

and Mill Work.

* Tillson’s Complete Automobile Instructor 16mo, 1 50

* Titsworth’s Elements of Mechanical Drawing Oblong 8vo, 1 25

Warren’s Elements of Machine Construction and Drawing 8vo, 7 50

* Waterbury’s Vest Pocket Hand-book of Mathematics 2⅞ × 5⅜ 1 00

for Engineers. inches,

mor.

* Enlarged Edition, Including Tables mor. 1 50

Weisbach’s Kinematics and the Power of Transmission. 8vo, 5 00

(Herrmann-Klein.)

Machinery of Transmission and Governors. 8vo, 5 00

(Hermann-Klein.)

Wood’s Turbines 8vo, 2 50

MATERIALS OF ENGINEERING.

Burr’s Elasticity and Resistance of the Materials of 8vo, 7 50

Engineering

Church’s Mechanics of Engineering 8vo, 6 00

Mechanics of Solids (Being Parts I, II, III of 8vo, 4 50

Mechanics of Engineering)

* Greene’s Structural Mechanics 8vo, 2 50

Holley’s Analysis of Paint and Varnish Products. (In

Press.)

* Lead and Zinc Pigments Large 12mo, 3 00

Johnson’s (C. M.) Rapid Methods for the Chemical Large 12mo, 3 00

Analysis of Special Steels, Steel-Making Alloys and

Graphite

Johnson’s (J. B.) Materials of Construction 8vo, 6 00

Keep’s Cast Iron 8vo, 2 50

* King’s Elements of the Mechanics of Materials and 8vo, 2 50

of Power of Transmission

Lanza’s Applied Mechanics 8vo, 7 50

Lowe’s Paints for Steel Structures 12mo, 1 00

Maire’s Modern Pigments and their Vehicles 12mo, 2 00

Maurer’s Technical Mechanics 8vo, 4 00

Merriman’s Mechanics of Materials 8vo, 5 00

* Strength of Materials 12mo, 1 00

Metcalf’s Steel. A Manual for Steel-users 12mo, 2 00

* Murdock’s Strength of Materials 12mo, 2 00

Sabin’s Industrial and Artistic Technology of Paint 8vo, 3 00

and Varnish

Smith’s (A. W.) Materials of Machines 12mo, 1 00

* Smith’s (H. E.) Strength of Material 12mo, 1 25

Thurston’s Materials of Engineering 3 vols. 8 00

8vo,

Part I. Non-metallic Materials of Engineering 8vo, 2 00

Part II. Iron and Steel 8vo, 3 50

Part III. A Treatise on Brasses, Bronzes, and 8vo, 2 50

Other Alloys and their Constituents

Waterbury’s Laboratory Manual for Testing Materials

of Construction. (In Press.)

Wood’s (De V.) Elements of Analytical Mechanics 8vo, 3 00

Treatise on the Resistance of Materials and an 8vo, 2 00

Appendix on the Preservation of Timber

Wood’s (M. P.) Rustless Coatings: Corrosion and 8vo, 4 00

Electrolysis of Iron and Steel

STEAM-ENGINES AND BOILERS.

Berry’s Temperature-entropy Diagram. Third Edition 12mo, 2 50

Revised and Enlarged

Carnot’s Reflections on the Motive Power of Heat. 12mo, 1 50

(Thurston.)

Chase’s Art of Pattern Making 12mo, 2 50

Creighton’s Steam-engine and other Heat Motors 8vo, 5 00

Dawson’s “Engineering” and Electric Traction 16mo, mor. 5 00

Pocket-book

* Gebhardt’s Steam Power Plant Engineering 8vo, 6 00

Goss’s Locomotive Performance 8vo, 5 00

Hemenway’s Indicator Practice and Steam-engine 12mo, 2 00

Economy

Hirshfeld and Barnard’s Heat Power Engineering. (In

Press.)

Hutton’s Heat and Heat-engines 8vo, 5 00

Mechanical Engineering of Power Plants 8vo, 5 00

Kent’s Steam Boiler Economy 8vo, 4 00

Kneass’s Practice and Theory of the Injector 8vo, 1 50

MacCord’s Slide-valves 8vo, 2 00

Meyer’s Modern Locomotive Construction 4to, 10 00

Miller, Berry, and Riley’s Problems in Thermodynamics 8vo, paper, 0 75

Moyer’s Steam Turbine 8vo, 4 00

Peabody’s Manual of the Steam-engine Indicator 12mo, 1 50

Tables of the Properties of Steam and Other 8vo, 1 00

Vapors and Temperature-Entropy Table

Thermodynamics of the Steam-engine and Other 8vo, 5 00

Heat-engines

* Thermodynamics of the Steam Turbine 8vo, 3 00

Valve-gears for Steam-engines 8vo, 2 50

Peabody and Miller’s Steam-boilers 8vo, 4 00

* Perkins’s Introduction to General Thermodynamics 12mo, 1 50

Pupin’s Thermodynamics of Reversible Cycles in Gases 12mo, 1 25

and Saturated Vapors. (Osterberg.)

Reagan’s Locomotives: Simple, Compound, and Electric. Large 12mo, 3 50

New Edition

Sinclair’s Locomotive Engine Running and Management 12mo, 2 00

Smart’s Handbook of Engineering Laboratory Practice 12mo, 2 50

Snow’s Steam-boiler Practice 8vo, 3 00

Spangler’s Notes on Thermodynamics 12mo, 1 00

Valve-gear 8vo, 2 50

Spangler, Greene, and Marshall’s Elements of 8vo, 3 00

Steam-engineering

Thomas’s Steam-turbines 8vo, 4 00

Thurston’s Handbook of Engine and Boiler Trials, and 8vo, 5 00

the Use of the Indicator and the Prony Brake

Handy Tables 8vo, 1 50

Manual of Steam-Boilers, their Designs, 8vo, 5 00

Construction, and Operation

Manual of the Steam-engine 2 vols., 10 00

8vo,

Part I. History, Structure, and Theory 8vo, 6 00

Part II. Design, Construction, and 8vo, 6 00

Operation

Wehrenfennig’s Analysis and Softening of Boiler 8vo, 4 00

Feed-water. (Patterson)

Weisbach’s Heat, Steam, and Steam-engines. (Du Bois.) 8vo, 5 00

Whitham’s Steam-engine Design 8vo, 5 00

Wood’s Thermodynamics, Heat Motors, and Refrigerating 8vo, 4 00

Machines

MECHANICS PURE AND APPLIED.

Church’s Mechanics of Engineering 8vo, 6 00

Mechanics of Fluids (Being Part IV of Mechanics 8vo, 3 00

of Engineering)

* Mechanics of Internal Work 8vo, 1 50

Mechanics of Solids (Being Parts I, II, III of 8vo, 4 50

Mechanics of Engineering)

Notes and Examples in Mechanics 8vo, 2 00

Dana’s Text-book of Elementary Mechanics for Colleges 12mo, 1 50

and Schools

Du Bois’s Elementary Principles of Mechanics:

Vol. I. Kinematics 8vo, 3 50

Vol. II. Statics 8vo, 4 00

Mechanics of Engineering. Vol. I. Small 4to, 7 50

Vol. II. Small 4to, 10 00

* Greene’s Structural Mechanics 8vo, 2 50

* Hartmann’s Elementary Mechanics for Engineering 12mo, 1 25

Students

James’s Kinematics of a Point and the Rational Large 12mo, 2 00

Mechanics of a Particle

* Johnson’s (W. W.) Theoretical Mechanics 12mo, 3 00

* King’s Elements of the Mechanics of Materials and 8vo, 2 60

of Power of Transmission

Lanza’s Applied Mechanics 8vo, 7 50

* Martin’s Text Book on Mechanics, Vol. I, Statics 12mo, 1 25

* Vol. II. Kinematics and Kinetics 12mo, 1 50

* Vol. III. Mechanics of Materials 12mo, 1 50

Maurer’s Technical Mechanics 8vo, 4 00

* Merriman’s Elements of Mechanics 12mo, 1 00

Mechanics of Materials 8vo, 5 00

* Michie’s Elements of Analytical Mechanics 8vo, 4 00

Robinson’s Principles of Mechanism 8vo, 3 00

Sanborn’s Mechanics Problems Large 12mo, 1 50

Schwamb and Merrill’s Elements of Mechanism 8vo, 3 00

Wood’s Elements of Analytical Mechanics 8vo, 3 00

Principles of Elementary Mechanics 12mo, 1 25

MEDICAL.

* Abderhalden’s Physiological Chemistry in Thirty 8vo, 5 00

Lectures. (Hall and Defren.)

von Behring’s Suppression of Tuberculosis. (Bolduan.) 12mo, 1 00

* Bolduan’s Immune Sera 12mo, 1 50

Bordet’s Studies in Immunity. (Gay.) 8vo, 6 00

* Chapin’s The Sources and Modes of Infection Large 12mo, 3 00

Davenport’s Statistical Methods with Special 16mo, mor. 1 50

Reference to Biological Variations

Ehrlich’s Collected Studies on Immunity. (Bolduan.) 8vo, 6 00

* Fischer’s Nephritis Large 12mo, 2 50

* Oedema 8vo, 2 00

* Physiology of Alimentation Large 12mo, 2 00

* de Fursac’s Manual of Psychiatry. (Rosanoff and Large 12mo, 2 50

Collins.)

* Hammarsten’s Text-book on Physiological Chemistry. 8vo, 4 00

(Mandel.)

Jackson’s Directions for Laboratory Work in 8vo, 1 25

Physiological Chemistry

Lassar-Cohn’s Praxis of Urinary Analysis. (Lorenz.) 12mo, 1 00

Mandel’s Hand-book for the Bio-Chemical Laboratory 12mo, 1 50

* Nelson’s Analysis of Drugs and Medicines 12mo, 3 00

* Pauli’s Physical Chemistry in the Service of 12mo, 1 25

Medicine (Fischer.)

* Pozzi-Escot’s Toxins and Venoms and their 12mo, 1 00

Antibodies (Cohn.)

Rostoski’s Serum Diagnosis. (Bolduan.) 12mo, 1 00

Ruddiman’s Incompatibilities in Prescriptions 8vo, 2 00

Whys in Pharmacy 12mo, 1 00

Salkowski’s Physiological and Pathological Chemistry. 8vo, 2 50

(Orndorff.)

* Satterlee’s Outlines of Human Embryology 12mo, 1 25

Smith’s Lecture Notes on Chemistry for Dental 8vo, 2 50

Students

* Whipple’s Tyhpoid Fever Large 12mo, 3 00

* Woodhull’s Military Hygiene for Officers of the Large 12mo, 1 50

Line

* Personal Hygiene 12mo, 1 00

Worcester and Atkinson’s Small Hospitals 12mo, 1 25

Establishment and Maintenance. and Suggestions for

Hospital Architecture, with Plans for a Small

Hospital

METALLURGY.

Betts’s Lead Refining by Electrolysis 8vo, 4 00

Bolland’s Encyclopedia of Founding and Dictionary of 12mo, 3 00

Foundry Terms used in the Practice of Moulding

Iron Founder 12mo, 2 50

Iron Founder Supplement 12mo, 2 50

* Borchers’s Metallurgy. (Hall and Hayward.) 8vo, 3 00

* Burgess and Le Chatelier’s Measurement of High 8vo, 4 00

Temperatures. Third Edition

Douglas’s Untechnical Addresses on Technical Subjects 12mo, 1 00

Goesel’s Minerals and Metals: A Reference Book 16mo, mor. 3 00

* Iles’s Lead-smelting 12mo, 2 50

Johnson’s Rapid Methods for the Chemical Analysis of Large 12mo, 3 00

Special Steels, Steel-making Alloys and Graphite

Keep’s Cast Iron 8vo, 2 50

Metcalf’s Steel. A Manual for Steel-users 12mo, 2 00

Minet’s Production of Aluminum and its Industrial 12mo, 2 50

Use. (Waldo.)

* Palmer’s Foundry Practice Large 12mo, 2 00

* Price and Meade’s Technical Analysis of Brass 12mo, 2 00

* Ruer’s Elements of Metallography. (Mathewson.) 8vo, 3 00

Smith’s Materials of Machines 12mo, 1 00

Tate and Stone’s Foundry Practice 12mo, 2 00

Thurston’s Materials of Engineering. In Three Parts 8vo, 8 00

Part I. Non-metallic Materials of Engineering,

see Civil Engineering, page 9

Part II. Iron and Steel 8vo, 3 50

Part III. A Treatise on Brasses, Bronzes, and 8vo, 2 50

Other Alloys and their Constituents

Ulke’s Modern Electrolytic Copper Refining 8vo, 3 00

West’s American Foundry Practice 12mo, 2 50

Moulders’ Text Book 12mo, 2 50

MINERALOGY.

* Browning’s Introduction to the Rarer Elements 8vo, 1 50

Brush’s Manual of Determinative Mineralogy. 8vo, 4 00

(Penfield.)

Butler’s Pocket Hand-book of Minerals 16mo, mor. 3 00

Chester’s Catalogue of Minerals 8vo, paper, 1 00

Cloth, 1 25

* Crane’s Gold and Silver 8vo, 5 00

Dana’s First Appendix to Dana’s New “System of Large 8vo, 1 00

Mineralogy.”

Dana’s Second Appendix to Dana’s New “System of Large 8vo, 1 50

Mineralogy.”

Manual of Mineralogy and Petrography 12mo, 2 00

Minerals and How to Study Them 12mo, 1 50

System of Mineralogy Large 8vo, 12 50

half

leather,

Text-book of Mineralogy 8vo, 4 00

Douglas’s Untechnical Addresses on Technical Subjects 12mo, 1 00

Eakle’s Mineral Tables 8vo, 1 25

* Eckel’s Building Stones and Clays 8vo, 3 00

Goesel’s Minerals and Metals: A Reference Book 16mo, mor. 3 00

* Groth’s The Optical Properties of Crystals. 8vo, 3 50

(Jackson.)

Groth’s Introduction to Chemical Crystallography 12mo, 1 25

(Marshall)

* Hayes’s Handbook for Field Geologists 16mo, mor. 1 50

Iddings’s Igneous Rocks 8vo, 5 00

Rock Minerals 8vo, 5 00

Johannsen’s Determination of Rock-forming Minerals in 8vo, With 5 00

Thin Sections Thumb Index

* Martin’s Laboratory Guide to Qualitative Analysis 12mo, 0 60

with the Blow-pipe

Merrill’s Non-metallic Minerals: Their Occurrence and 8vo, 4 00

Uses

Stones for Building and Decoration 8vo, 5 00

* Penfield’s Notes on Determinative Mineralogy and 8vo, paper, 0 50

Record of Mineral Tests

Tables of Minerals, Including the Use of 8vo, 1 00

Minerals and Statistics of Domestic Production

* Pirsson’s Rocks and Rock Minerals 12mo, 2 50

* Richards´s Synopsis of Mineral Characters 12mo, mor. 1 25

* Ries’s Clays: Their Occurrence, Properties and Uses 8vo, 5 00

* Ries and Leighton’s History of the Clay-working 8vo, 2 50

industry of the United States

* Rowe’s Practical Mineralogy Simplified 12mo, 1 25

* Tillman’s Text-book of Important Minerals and Rocks 8vo, 2 00

Washington’s Manual of the Chemical Analysis of Rocks 8vo, 2 00

MINING.

* Beard’s Mine Gases and Explosions Large 12mo, 3 00

* Crane’s Gold and Silver 8vo, 5 00

* Index of Mining Engineering Literature 8vo, 4 00

* 8vo, 5 00

mor.

* Ore Mining Methods 8vo, 3 00

* Dana and Saunders’s Rock Drilling 8vo, 4 00

Douglas’s Untechnical Addresses on Technical Subjects 12mo, 1 00

Eissler’s Modern High Explosives 8vo, 4 00

Goesel’s Minerals and Metals: A Reference Book 16mo, mor. 3 00

Ihlseng’s Manual of Mining 8vo, 5 00

* Iles’s Lead Smelting 12mo, 2 50

* Peele’s Compressed Air Plant 8vo, 3 50

Riemer’s Shaft Sinking Under Difficult Conditions. 8vo, 3 00

(Corning and Peele.)

* Weaver’s Military Explosives 8vo, 3 00

Wilson’s Hydraulic and Placer Mining. 2d edition, 12mo, 2 50

rewritten

Treatise on Practical and Theoretical Mine 12mo, 1 25

Ventilation

SANITARY SCIENCE.

Association of State and National Food and Dairy 8vo, 3 00

Departments, Hartford Meeting, 1906

Jamestown Meeting, 1907 8vo, 3 00

* Bashore’s Outlines of Practical Sanitation 12mo, 1 25

Sanitation of a Country House 12mo, 1 00

Sanitation of Recreation Camps and Parks 12mo, 1 00

* Chapin’s The Sources and Modes of Infection Large 12mo, 3 00

Folwell’s Sewerage. (Designing, Construction, and 8vo, 3 00

Maintenance.)

Water-supply Engineering 8vo, 4 00

Fowler’s Sewage Works Analyses 12mo, 2 00

Fuertes’s Water-filtration Works 12mo, 2 50

Water and Public Health 12mo, 1 50

Gerhard’s Guide to Sanitary Inspections 12mo, 1 50

* Modern Baths and Bath Houses 8vo, 3 00

Sanitation of Public Buildings 12mo, 1 50

* The Water Supply, Sewerage, and Plumbing of 8vo, 4 00

Modern City Buildings.

Hazen’s Clean Water and How to Get It Large 12mo, 1 50

Filtration of Public Water-supplies 8vo, 3 00

* Kinnicutt, Winslow and Pratt’s Sewage Disposal 8vo, 3 00

Leach’s Inspection and Analysis of Food with Special 8vo, 7 50

Reference to State Control

Mason’s Examination of Water. (Chemical and 12mo, 1 25

Bacteriological)

Water-supply. (Considered principally from a 8vo, 4 00

Sanitary Standpoint).

* Mast’s Light and the Behavior of Organisms Large 12mo, 2 50

* Merriman’s Elements of Sanitary Engineering 8vo, 2 00

Ogden’s Sewer Construction 8vo, 3 00

Sewer Design 12mo, 2 00

Parsons’s Disposal of Municipal Refuse 8vo, 2 00

Prescott and Winslow’s Elements of Water 12mo, 1 50

Bacteriology, with Special Reference to Sanitary

Water Analysis

* Price’s Handbook on Sanitation 12mo, 1 50

Richards’s Conservation by Sanitation 8vo, 2 50

Cost of Cleanness 12mo, 1 00

Cost of Food. A Study in Dietaries 12mo, 1 00

Cost of Living as Modified by Sanitary Science 12mo, 1 00

Cost of Shelter 12mo, 1 00

Richards and Woodman’s Air, Water, and Food from a 8vo, 2 00

Sanitary Standpoint

* Richey’s Plumbers’, Steam-fitters’, and Tinners’ 16mo, mor. 1 50

Edition (Building Mechanics’ Ready Reference

Series)

Rideal’s Disinfection and the Preservation of Food 8vo, 4 00

Soper’s Air and Ventilation of Subways 12mo, 2 50

Turneaure and Russell’s Public Water supplies 8vo, 5 00

Venable’s Garbage Crematories in America 8vo, 2 00

Method and Devices for Bacterial Treatment of 8vo, 3 00

Sewage

Ward and Whipple’s Freshwater Biology. (In Press.)

Whipple’s Microscopy of Drinking-water 8vo, 3 50

* Typhoid Fever Large 12mo, 3 00

Value of Pure Water Large 12mo, 1 00

Winslow’s Systematic Relationship of the Coccaceæ Large 12mo, 2 50

MISCELLANEOUS.

* Burt’s Railway Station Service 12mo, 2 00

* Chapin’s How to Enamel 12mo, 1 00

Emmons’s Geological Guide-book of the Rocky Mountain Large 8vo, 1 50

Excursion of the International Congress of

Geologists

Ferrel’s Popular Treatise on the Winds 8vo, 4 00

Fitzgerald’s Boston Machinist 18mo, 1 00

* Fritz, Autobiography of John 8vo, 2 00

Gannett’s Statistical Abstract of the World 24mo, 0 75

Haines’s American Railway Management 12mo, 2 50

Hanausek’s The Microscopy of Technical Products. 8vo, 5 00

(Winton)

Jacobs’s Betterment Briefs. A Collection of Published 8vo, 3 50

Papers on Organized Industrial Efficiency

Metcalfe’s Cost of Manufactures, and the 8vo, 5 00

Administration of Workshops

* Parkhurst’s Applied Methods of Scientific 8vo, 2 00

Management

Putnam’s Nautical Charts 8vo, 2 00

Ricketts’s History of Rensselaer Polytechnic Large 12mo, 3 00

Institute 1824–1894

* Rotch and Palmer’s Charts of the Atmosphere for Oblong 4to, 2 00

Aeronauts and Aviators

Rotherham’s Emphasised New Testament Large 8vo, 2 00

Rust’s Ex-Meridian Altitude, Azimuth and Star-finding 8vo, 5 00

Tables

Standage’s Decoration of Wood, Glass, Metal, etc. 12mo, 2 00

Thome’s Structural and Physiological Botany. 16mo, 2 25

(Bennett)

Westermaier’s Compendium of General Botany. 8vo, 2 00

(Schneider)

Winslow’s Elements of Applied Microscopy 12mo, 1 50

HEBREW AND CHALDEE TEXT-BOOKS.

Gesenius’s Hebrew and Chaldee Lexicon to the Old Small 4to, 5 00

Testament Scriptures. (Tregelles.) half mor.

Green’s Elementary Hebrew Grammar 12mo, 1 25

------------------------------------------------------------------------

TRANSCRIBER’S NOTES

1. Silently corrected typographical errors.

2. Retained anachronistic and non-standard spellings as printed.

3. Enclosed italics font in _underscores_.

4. Subscripts are denoted by an underscore before a series of

subscripted characters enclosed in curly braces, e.g. H_{2}O.

Practical Methods of Sewage Disposal for Residences, Hotels and Institutions · 第 7 / 7 章