State where you saw this.
]
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[Illustration]
=$4. TELEPHONES=
For Business Purposes, ours excel all others in clearness and volume
of tone. Illus. circular and testimonials for 3 cts.
Address J. R. HOLCOMB, Mallet Creek, Ohio.
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EXPLOSIVE DUST. A COMPREHENSIVE description of the Dangers from Dust
in various Manufactures and the Cause of many Fires. How combustible
substances can explode. Spontaneous Combustion of Iron, Charcoal, and
Lampblack in Air. Flour Dust and Brewery Dust Explosions. Explosions
of Coal Dust in Mines. Contained in SCIENTIFIC AMERICAN SUPPLEMENT
NO. =125.= Price 10 cents. To be had at this office and of all
newsdealers.
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=Can I Obtain a Patent?=
This is the first inquiry that naturally occurs to every author or
discoverer of a new idea or improvement. The quickest and best way
to obtain a satisfactory answer, without expense, is to write to us
(Munn & Co.), describing the invention, with a small sketch. All we
need is to get the _idea_. Do not use pale ink. Be brief. Send stamps
for postage. We will immediately answer and inform you whether or
not your improvement is probably patentable; and if so, give you the
necessary instructions for further procedure. Our long experience
enables us to decide quickly. For this advice we make _no charge_.
All persons who desire to consult us in regard to obtaining patents
are cordially invited to do so. We shall be happy to see them in
person at our office, or to advise them by letter. In all cases, they
may expect from us a careful consideration of their plans, an honest
opinion, and a prompt reply.
_What Security Have I_ that my communication to Munn & Co. will be
faithfully guarded and remain confidential?
_Answer._-You have none except our well-known integrity in this
respect, based upon a most extensive practice of thirty years'
standing. Our clients are numbered by hundreds of thousands. They
are to be found in every town and city in the Union. Please to
make inquiry about us. Such a thing as the betrayal of a client's
interests, when committed to our professional care, never has
occurred, and is not likely to occur. All business and communications
intrusted to us are kept _secret and confidential_.
Address =MUNN & CO.,=
Publishers of the SCIENTIFIC AMERICAN,
=37 Park Row New York.=
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=Advertisements.=
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=Inside Page, each insertion - - - 75 cents a line.
Back Page, each insertion - - - $1.00 a line.=
(About eight words to a line.)
_Engravings may head advertisements at the same rate per line, by
measurement, as the letter press. Advertisements must be received at
publication office as early as Thursday morning to appear in next
issue._
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=TELEPHONES,=
Perfect working, at reduced prices. Send for illustrated circular to
=TELEPHONE SUPPLY CO.,=
=Box 3224, Boston, Mass.=
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[Illustration:
=H.W. JOHNS'=
ASBESTOS
TRADEMARK
]
=LIQUID PAINTS, ROOFING, BOILER COVERINGS,=
Steam Packing, Sheathings, Fire Proof Coatings, Cements.
SEND FOR SAMPLES, ILLUSTRATED PAMPHLET AND PRICE LIST.
=H. W. JOHNS M'F'G Co., 87= MAIDEN LANE, N. Y.
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=Mill Stones and Corn Mills.=
We make Burr Millstones, Portable Mills, Smut Machines, Packers, Mill
Picks, Water Wheels, Pulleys, and Gearing, specially adapted to Flour
Mills. Send for catalogue.
=J. T. NOYE & SON, Buffalo, N. Y.=
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[Illustration]
=WARRANTED THE BEST.
1 H. P. Boiler & Engine, $150.
2 H. P., $175. 3 H. P., $200.=
Tested to 200 lbs. Steam.
=LOVEGROVE & CO.,
152 N. 3d St., Philadelphia, Pa.,=
Builders of Engines and Boilers, 1 to 100 horse power. Send for
circulars and prices, and state size and style you want.
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ESTABLISHED 1844.
=JOSEPH C. TODD,=
ENGINEER and MACHINIST. Flax, Hemp, Jute, Rope, Oakum and Bagging
Machinery, Steam Engines, Boilers, etc. I also manufacture Baxter's
New Portable Engine of 1877. Can be seen in operation at my store. A
one horse-power, portable engine, complete, $125; two horse-power,
$225; two and a half horse-power, $250; three horse-power, $275.
Manufactured exclusively by
=J. C. TODD,=
10 Barclay St., New York, or Paterson, N. J.
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=CAMERON=
=Steam Pumps=
For Mines, Blast Furnaces, Rolling Mills, Oil Refineries, Boiler
Feeders, &c.
For Illustrated Catalogue and _Reduced_ Price List send to =Works, Foot
East 23d St., New York.=
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[Illustration: WIRE ROPE]
Address JOHN A. ROEBLING'S SONS, Manufacturers, Trenton, N. J., or 117
Liberty Street, New York.
Wheels and Rope for conveying power long distances. Send for circular.
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=$1200 Salary.= Salesmen wanted to sell our Staple Goods to dealers.
No peddling. =Expenses= paid. Permanent employment. address S. A.
GRANT & CO., 2, 4, 6 & 8 Home St., Cincinnati, O.
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_Working Models_
And Experimental Machinery, Metal or Wood, made to order by
J. F. WERNER, 62 Centre St., N. Y.
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B. W. Payne & Sons, Corning, N. Y.
Established in 1840.
[Illustration]
Eureka Safety Power.
|h.p. cyl. ht. space. wt. price.
-------------------------------------------
| 2 |3-1/8x4| 48 in.| 40x25 | 900 | $150 |
-------------------------------------------|
| 4 | 4x6 | 56 | 46x30 | 1600 | 250 |
-------------------------------------------|
| 6 | 5x7 | 72 | 72x42 | 2700 | 400 |
-------------------------------------------
|_Also_, =SPARK ARRESTING PORTABLES=, _and_|
| =Stationary Engines= _for Plantations_. |
| Send for Circulars. |
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Patent Wood-working Machinery, Band Saws Scroll Saws, Friezers, etc.
Cordesman, Egan & Co., Cincin'ti, O.
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=CORLISS ENGINES.=
Beam, horizontal, vertical, condensing, and non-condensing Steam
Engines.
=Machine Tools, Sugar Machinery.=
=Facilities for Constructing Heavy Machinery.=
Send for Circular.
PASSAIC MACHINE WORKS,
WATTS, CAMPBELL & CO., Proprietors,
Newark, N. J.
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[Illustration]
THE ONLY Genuine GEISER SELF-REGULATING GRAIN SEPARATOR. Celebrated
for its light and smooth movements, also SEPARATING and CLEANING all
kinds of grain.
Manufactured only by
THE GEISER M'F'G CO., Waynesboro, Franklin Co., Pa.
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=CIGAR BOX LUMBER,=