TOOLS AND MATERIALS.
_281. Your Workshop._ If possible, keep all your work, tools and
apparatus in one room, and lock the door when you leave.
The work-bench may be made of an old kitchen table, or of a strong,
large box. The tool chest may be made of any clean box about the size of
a soap box. Shelves can be made by setting soap or starch boxes on their
sides, one above the other.
_282. The tools_ needed are generally mentioned in the proper places,
under the directions for construction. It is better to buy your tools as
required, than to buy too many at once, some of which you may not need.
If you have absolutely no tools, not even a saw or hammer, you will be
obliged to buy or borrow, although a great deal can be done with a good
knife. Do not be satisfied with rough-looking pieces of apparatus.
There are a few important tools needed for this work. While substitutes
can be found for most of them, the boy who has access to a wood-working
bench and tools will be able to do better and more rapid work than the
boy who has no such tools.
283. List of tools. The following tools are needed, if rapid, accurate
work is desired:
(1.) Lead pencil. (2.) A rule, divided into sixteenths for measuring. A
straight foot rule will do,--cost one cent. (3.) Steel point for
scratching lines on tin and copper. A stout needle-point is just the
thing. (4.) An awl for making holes in wood; one that is a little less
than 1/8 in. in diameter is best. (See App. 25.) (5.) A try-square with
a 6 in. blade, so that you can mark out your apparatus with square
corners. You can use a square-cornered box or piece of pasteboard, if
you have no try-square. (6.) Chisels are very useful, but you can do
wonders with a good sharp knife. (7.) Screw-driver. Do not use a good
knife-blade for a screw-driver. (8.) A saw, one with teeth that are not
too coarse is to be preferred. (9.) A plane is extremely useful to make
your wood-work smooth and neat; but a great deal can be done with the
sharp edges of broken glass, followed by a good rubbing with fine
sand-paper. (10.) A brace and a set of bits may be needed in 2 or 3
cases, but nearly all of the holes can be made as in App. 25. (11.)
Punches for sheet-tin, etc., will save much time. (See App. 26, 27.) For
small holes in binding-posts, etc., use a flat-ended punch, 1/8 in. in
diameter. You should have one 1/4 or 5/16 in. in diameter, if you make
your yokes, armatures, etc., as in Chapter VIII. A blacksmith will help
you out with this. (12.) A center-punch or sharp-pointed punch for
making dents in metal. A sharp-pointed wire nail will do for tin and
copper. (13.) Files for metal. (14.) Some sort of a vice or clamp. (See
App. 79, 80.) (15.) Shears for cutting sheet-tin, etc. A pair of old
shears will do. (16.) An anvil or piece of old iron that may be used to
hammer on to flatten tin, etc. An old flat-iron makes a good anvil.
(17.) Hammer.
The small hollow handle tool sets are very handy, and they contain small
chisels, awls, screw-driver, etc. These sets cost from 50 cents up.
_284. Materials._ For wood you will find the sides and ends of clean
soap or starch boxes about the right thickness; they are fairly smooth
to begin with. For thin wood use cigar boxes. The pieces from old boxes
should be removed with care, and saved in one place, which may be called
your lumber yard. All nails should be removed with a claw-hammer. Look
out for nails when using a saw, plane or other edged tool. (See Sec.
297.) The edges of bases, etc., may be bevelled as shown in Fig. 95.
This is not necessary, but it adds greatly to the appearance.
285. Screw-Eyes. Brass screw-eyes, with copper burs, make excellent
binding-posts. (App. 45, 46.) Those that are 3/8 in. in diameter inside
the circle are about right. These are about 1-1/4 in. long in all, with
a 1/2 in. thread.
286. Copper Burs, such as are used with rivets, are very handy. The size
that is 1/2 in. in diameter, with a 1/8 in. hole, is good.
[Illustration: Fig. 125.]
287. Copper Wire. This can be bought at an electrician's. The only
trouble, however, in buying small quantities is that you may have to pay
a large price in proportion. If you get it on 1/2 lb. spools you can
handle it much better (see App. 23) than you can if you have it in a
tangle. It is well to have 1/2 lb. of No. 24 or 25 for electro-magnets,
current-detectors, etc., etc. 1/2 lb. of No. 30 will not be too much, if
you make induction coils. If you handle your wire carefully, single
cotton-covered will do. Double cotton-covered is better than single, but
it costs more. Be careful not to injure the covering. (See below for
splicing wire.) Look out for broken wire.
288. Splicing Wire. Fig. 125. Do not simply touch two wires together
and imagine that you have a good connection; a mere twist is not
sufficient. Clean the ends of old wire thoroughly with a file or
knife-blade, and join them as shown in Fig. 125.
289. Copper. Sheet-copper can be purchased at a tinsmith's or at a
hardware store. Electricians usually have a thin variety of copper
called brush copper, which makes good battery-plates, binding-posts,
etc. You can cut this thin copper with an ordinary pair of shears.
290. Iron. For thin sheet-iron, nothing is better than sheet-tin. (See
tin.) Hoop iron is thicker than tin, and makes good yokes, etc. In many
cases, ordinary nails may be used where a magnetic substance is needed.
Annealed iron wire is extremely soft. (See text-book for experiments
with steel and iron.)
291. Steel. Old files, watch-springs, clock-springs, corset-steels,
knitting-needles, harness-needles, hack-saw blades, sewing-needles,
etc., are generally made of a good quality of steel.
292. Zinc, in the sheet form, can be bought at a hardware store. For a
few cents you can get quite a large piece. Get the thick pieces for
heavy battery-plates of an electrician. You do not need anything that is
thicker than 1/8 in. The zinc rods are usually amalgamated.
293. Lead can be bought at a plumber's, tinsmith's, or hardware store.
You may want some for a storage cell.
294. Nails. Wire nails are best for light work. Get an assortment from
1/2 in. long up to 1-1/2 in.
295. Screws. It is better to use brass screws around electrical
apparatus. For the small work, for binding-posts, etc., use 5/8 No. 5.
Another handy size is No. 7, from 3/4 to 1-1/4 in. long. The
round-headed screws are best, unless you want to countersink them.
296. Tin. This is really thin sheet-iron, covered with tin. Save up
tomato-cans, cracker-boxes, condensed-milk cans, etc. The cracker-boxes
are just as good as sheet-tin, as the pieces are large and clean. You
can remove the solder from cans by heating them in the kitchen fire.
Knock out the bottoms with a poker when the solder gets soft. Clean the
tin with sand-paper.
297. Carbons. You can get carbon rods or plates at an electrician's. If
you have arc electric lights in your city, you will be able to pick up
carbons; these, however, generally have a coating of copper, which must
be eaten off with dilute nitric acid. This is a bother. You will find it
cheaper to buy the 1/2 in. rods that are 12 in. long, and uncoated.
298. Shellac. Your wood-work will be much improved by using shellac upon
it after you have thoroughly sand-papered it. You can get it, all
prepared, at a paint store. Wood-alcohol is used to thin it if it gets
too thick. Keep it in a wide-mouth bottle. Paint it on quickly and
evenly with a brush, and do not go over it again when it is partly dry.
Wait until it is thoroughly hard before putting on a second coat. It
should be fairly thin to spread well. Clean your brush in wood-alcohol
before putting it away, and keep the shellac bottle tightly corked. A
small tin can or a teacup is best to hold the shellac when using it.
* * * * *
THINGS A BOY SHOULD KNOW ABOUT ELECTRICITY.
By THOMAS M. ST. JOHN, Met. E.
The book contains 180 pages, and 260 illustrations; it measures
5 x 7-1/2 in., and is bound in cloth.
Seventh Edition Price, postpaid, $1.00
CONTENTS: Chapter I. About Frictional Electricity.--II. About
Magnets and Magnetism.--III. How Electricity is Generated by the
Voltaic Cell.--IV. Various Voltaic Cells.--V. About Push-Buttons,
Switches and Binding-Posts.--VI. Units and Apparatus for Electrical
Measurements.--VII. Chemical Effects of the Electric
Current.--VIII. How Electroplating and Electrotyping are Done.--IX.
The Storage Battery and How it Works.--X. How Electricity is
Generated by Heat.--XI. Magnetic Effects of the Electric
Current.--XII. How Electricity is Generated by Induction.--XIII.
How the Induction Coil Works.--XIV. The Electric Telegraph, and How
it Sends Messages.--XV. The Electric Bell and Some of its
Uses.--XVI. The Telephone, and How it Transmits Speech.--XVII. How
Electricity is Generated by Dynamos.--XVIII. How the Electric
Current is Transformed.--XIX. How Electric Currents are Distributed
for Use.--XX. How Heat is Produced by the Electric Current.--XXI.
How Light is Produced by the Incandescent Lamp.--XXII. How Light is
Produced by the Arc Lamp.--XXIII. X-Rays, and How the Bones of the
Human Body are Photographed.--XXIV. The Electric Motor and How it
Does Work.--XXV. Electric Cars, Boats and Automobiles.--XXVI. A
Word About Central Stations.--XXVII. Miscellaneous Uses of
Electricity.
This book explains, in simple, straightforward language, many things
about electricity; things in which the American boy is intensely
interested; things he wants to know; things he should know.
It is free from technical language and rhetorical frills, but it tells
how things work, and why they work.
It is brimful of illustrations--the best that can be had--illustrations
that are taken directly from apparatus and machinery, and that show what
they are intended to show.
This book does not contain experiments, or tell how to make apparatus;
our other books do that. After explaining the simple principles of
electricity, it shows how these principles are used and combined to make
electricity do every-day work.
* * * * *
_Everyone Should Know About Electricity._
* * * * *
A VERY APPROPRIATE PRESENT
Things a Boy Should Know About Wireless
By
THOMAS M. ST. JOHN, Met. E.
Author of "Things a Boy Should Know about Electricity," "Fun with
Electricity," "The Study of Elementary Electricity and Magnetism by
Experiment," "The Study of Electric Motors by Experiment," "Electrical
Handicraft," Etc., Etc.
126 Pages--109 Illustrations and Diagrams
Bound in Cloth--Net $1.00
This book contains much practical and some theoretical information
regarding the operation and explanation of wireless outfits. It
discusses enough of the theoretical side to make the student sure of
himself and to give a well-rounded knowledge of this most practical
subject.
The author has explained the various pieces of apparatus needed in a
wireless station in such a clear manner that the student can not fail to
understand how they work and why they work. The numerous drawings and
diagrams simplify the discussions to such an extent that the reader will
not want to skip a single paragraph.
"Things a Boy Should Know About Wireless" will be welcomed by thousands
of enthusiasts and it should find its way into every library.
From
THOMAS M. ST. JOHN
Cascade Ranch.
East Windham,--N.Y.
The Study of Elementary Electricity and Magnetism by Experiment
By THOMAS M. ST. JOHN, Met. E.
FOURTH EDITION Price, postpaid, $1.25.
The book contains 220 pages and 168 illustrations. It measures
5 x 7-1/2 in., and it is bound in green cloth.
CONTENTS: Part I. Magnetism.--Chapter I. Iron and Steel.--II.
Magnets.--III. Induced Magnetism.--IV. The Magnetic Field.--V.
Terrestrial Magnetism. Part II. Static Electricity.--VI.
Electrification.--VII. Insulators and Conductors--VIII. Charging
and Discharging Conductors.--IX. Induced Electrification.--X.
Condensation of Electrification.--XI. Electroscopes.--XII.
Miscellaneous Experiments.--XIII. Atmospheric Electricity. Part
III. Current Electricity.--XIV. Construction and Use of
Apparatus.--XV. Galvanic Cells and Batteries.--XVI. The Electric
Circuit.--XVII. Electromotive Force.--XVIII. Electrical
Resistance.--XIX. Measurement of Resistance.--XX. Current
Strength.--XXI. Chemical Effects of the Electric Current.--XXII.
Electromagnetism.--XXIII. Electromagnets.--XXIV. Thermo
electricity.--XXV. Induced Currents.--XXVI. The Production of
Motion by Currents.--XXVII. Applications of Electricity.--XXVIII.
Wire Tables.--Apparatus List.--Index.
This is a text-book for amateurs, students, and others who want to take
up a systematic course of electrical experiments at home or in school.
It will give a practical and experimental knowledge of elementary
electricity, and thoroughly prepare students for advanced work. Full
directions are given for
TWO HUNDRED EXPERIMENTS.
The experiments and discussions are so planned that the student is
always prepared for what follows. Although the experiments may be
performed with the apparatus that is usually found in school
laboratories, the author has designed a complete set of apparatus for
those who want to have their own outfit.
* * * * *
_If you want to take up a systematic course of experiments--experiments
that will build a lasting foundation for your electrical knowledge--this
book will serve as a valuable guide._
Jan. 1, 1918 STUDENT'S DISCOUNT DISCONTINUED
PRICE TO ALL, $6.25
Owing to greatly increased costs of labor and materials the discount of
65c formerly allowed on this set has been discontinued. Complete sets
only now sold. Shipping weight on improved sets 10 lbs. securely packed
in wooden box. Sent by parcel post if proper postage is included in your
remittance; otherwise by express charges collect.
Fun With Magnetism and Fun With Electricity have started more young men
upon electrical careers than any other scientific outfits ever placed
before the public. The thousands upon thousands that have been sold in
all parts of the world have furnished fun and science for people of all
ages, and the mere fact that they are listed by the New York Board of
Education, and recommend to the pupils and teachers of the New York
public and private schools is a guarantee of their value. Were it not
for the fact that these are made in such large quantities and sold by
stores, agents and mail-order houses, the price would be much higher.
Don't fail to get these. They have a national reputation.
FUN WITH MAGNETISM
This outfit contains a 32-page book of instructions, with 45
illustrations, together with a complete set of apparatus for performing
61 fascinating experiments. It will give you some new ideas about
magnetism and start you at the right place in your study of electricity.
Think what that means--to start right!
The book contains experiments with the horseshoe magnet, with bar
magnets, with floating magnets, etc., etc., thus giving a practical
knowledge of the subject; and it is all done in such an interesting way
that one can't help remembering it. Every experiment clinches some fact
and every fact is important.
Amusing Experiments.--Something for Nervous People to Try.--The Jersey
Mosquito.--The Stampede.--The Runaway.--The Dog-fight.--The
Whirligig.--The Naval Battle.--A String of Fish.--A Magnetic Gun.--A Top
Upside down.--A Magnetic Windmill.--A Compass Upside down.--The Magnetic
Acrobat.--The Busy Ant-hill.--The Magnetic Bridge.--The
Merry-go-Round.--The Tight-rope Walker.--A Magnetic Motor Using
Attractions and Repulsions.--And 43 Others.
No. R1--"Fun with Magnetism," Complete Outfit, postpaid $0.35
[Illustration]
FUN WITH ELECTRICITY
The author of this Fun with Science series has spent a great deal of
time and money in experimenting to devise apparatus that will do the
proper work and be, at the same time, simple and cheap, and in no outfit
has he succeeded better than in Fun with Electricity. When you think of
an outfit retailing for 50c. and covering the whole subject of "Static
Electricity," giving 60 scientific experiments upon its production,
conduction and induction, with a 55-page book of instructions with 38
drawings, and a complete set of apparatus of 20 articles for performing
these 60 experiments, you will understand why the sales of this outfit
have been enormous. As the subject is presented in a fascinating
way--and not as mere dry science--every one likes to do the experiments.
No wonder these sets are highly praised by parents and educators in
every part of the country!
There is Fun in these Experiments: Chain Lightning.--An Electric
Whirligig.--The Baby Thunderstorm.--A Race with Electricity.--An
Electric Frog Pond.--An Electric Ding-Dong.--The Magic Finger.--Daddy
Long-Legs.--Jumping Sally.--An Electric Kite.--Very Shocking.--Condensed
Lightning.--An Electric Fly-Trap.--The Merry Pendulum.--An Electric
Ferry-Boat.--A Funny Piece of Paper.--A Joke on the Family
Cat.--Electricity Plays Leap-Frog.--Lightning Goes Over a
Bridge.--Electricity Carries a Lantern.--And 40 Others.
There isn't an outfit anywhere at any price that gives better value for
the money. An ideal present for a boy.
No. R2--"Fun with Electricity," Complete Outfit, postpaid $0.65
FUN WITH PUZZLES
Here is an outfit that every boy and girl should have, for it is
amusing, instructive and educational. It is real fun to do puzzles and
to puzzle your friends, and this book contains some real brain-teasers
that will make you think. The book contains 15 chapters, 80 pages, and
128 illustrations, and measures 5x7-1/2 inches. If you can't do any
particular puzzle you will find its solution in the "key," which is
bound with the book. If you want to win prizes by doing the puzzles in
the magazines, you will find this book of four hundred puzzles a regular
school of puzzles that will give you a thorough training for this kind
of work. The book alone is well worth the price, to say nothing of the
outfit of numbers, counters, pictures, etc.
Contents of Book: Chapter (1) Secret Writing. (2) Magic Triangles,
Squares, Rectangles, Hexagons, Crosses, Circles, etc. (3) Dropped Letter
and Dropped Word Puzzles. (4) Mixed Proverbs, Prose and Rhyme. (5) Word
Diamonds, Squares, Triangles, and Rhomboids. (6) Numerical Enigmas. (7)
Jumbled Writing and Magic Proverbs. (8) Dissected Puzzles. (9) Hidden
and Concealed Words. (10) Divided Cakes, Pies, Gardens, Farms, etc. (11)
Bicycle and Boat Puzzles. (12) Various Word and Letter Puzzles. (13)
Puzzles with Counters. (14) Combination Puzzles. (15) Mazes and
Labyrinths.
Secret Writing is explained in this book, and it shows how you can write
letters to your friends and be sure that no one can read them unless
they are also in the secret. This one thing alone will give you a great
deal of enjoyment. Get this outfit and have some fun.
No. R3--"Fun with Puzzles," Complete Outfit, postpaid $0.35
* * * * *
FUN WITH SOAP-BUBBLES
Fancy Bubbles and Films are not easily blown without special apparatus,
and even with the proper outfit one must "know how." That's why we
furnish a 16-page book with every set to show just how to do it. With
the aid of the 21 illustrations and the directions you can produce
remarkable results that will surprise and entertain your friends. A
child can do it as well as a grown person.
[Illustration]
Soap-Bubble Parties using these outfits create real sensations. Why not
be the first in your town to give a "Fun with Soap-Bubbles Party?" Just
write and ask about the price for any special number of them--say six or
a dozen.
Contents of Book: Twenty-one Illustrations.--Introduction.--The Colors
of Soap-Bubbles.--The Outfit.--Soap Mixture.--Useful Hints.--Bubbles
Blown with Pipes.--Bubbles Blown with Straws.--Bubbles Blown with the
Horn.--Floating Bubbles.--Baby Bubbles.--Smoke Bubbles.--Bombshell
Bubbles.--Dancing Bubbles.--Bubble Games.--Supported Bubbles.--Bubble
Cluster.--Suspended Bubbles.--Bubble Lamp Chimney.--Bubble
Lenses.--Bubble Basket.--Bubble Bellows.--To Draw a Bubble Through a
Ring.--Bubble Acorn.--Bubble Bottle.--A Bubble Within a Bubble.--Another
Way.--Bubble Shade.--Bubble Hammock.--Wrestling Bubbles.--A Smoking
Bubble.--Soap Films.--The Tennis Racket Film.--Fish-net
Film.--Pan-shaped Film.--Bow and Arrow Film.--Bubble Dome.--Double
Bubble Dome.--Pyramid Bubbles.--Turtle-back Bubbles.--Soap-Bubbles and
Frictional Electricity.
"There is nothing more beautiful than the airy-fairy soap-bubble with
its everchanging colors." This outfit gives the best possible amusement
for old and young.
No. R4--"Fun with Soap-Bubbles," Complete Outfit, postpaid $0.35
Three extra packages of prepared soap, postpaid .10
FUN WITH SHADOWS
No wonder shadow-making has been popular for several centuries! What
could give keener delight than comical shadow-pictures, pantomimes,
entertainments, etc.? Professional shadowists use wires, forms, and
various devices to aid them, and that is why they get such wonderful
results on the stage. Do you want to do the same thing right in your own
home and entertain your friends with all kinds of fancy shadows? You can
do it with this outfit, for the book contains 100 illustrations and
diagrams with directions for using the numerous articles included in the
box. You will be surprised to see how easily you can make these funny
shadows with the aid of the outfit. Better get one now and make shadows
like a professional.
[Illustration]
The Outfit contains everything necessary for all ordinary shadow
pictures, shadow entertainments, shadow plays, etc. The following
articles are included: One book of Instructions called "Fun with
Shadows"; 1 Shadow Screen; 2 Sheets of Tracing Paper; 1 Coil of Wire for
Movable Figures; 1 Cardboard Frame for Circular Screen; 1 Cardboard
House for Stage Scenery; 1 Jointed Wire Fish-pole and Line; 2 Bent Wire
Scenery Holders; 4 Clamps for Screen; 1 Wire Figure Support; 1 Wire for
Oar; 2 Spring Wire Table Clamps; 1 Wire Candlestick Holder; 5 Cardboard
Plates containing the following printed figures that should be cut out
with shears; 12 Character Hats; 1 Boat; 1 Oar-blade; 1 Fish; 1
Candlestick; 1 Cardboard Plate containing printed parts for making
movable figures.
No. R5--"Fun with Shadows," Complete Outfit, postpaid $0.35
* * * * *
FUN WITH PHOTOGRAPHY
Popular Pastimes are numerous, but to many there is nothing more
fascinating than photography. The magic of sunshine, the wonders of
nature, and the beauties of art are tools in the hands of the amateur
photographer. If you want to get a start in this up-to-date hobby, this
outfit will help you. You will enjoy the work and be delighted with the
beautiful pictures you can make.
The Outfit contains everything necessary for making prints--together
with other articles to be used in various ways. The following things are
included: One Illustrated Book of Instructions, called "Fun With
Photography"; 1 Package of Sensitized Paper; 1 Printing Frame, including
Glass, Back, and Spring; 1 Set of Masks for Printing Frame; 1 Set of
Patterns for Fancy Shapes; 1 Book of Negatives (Patented) Ready for Use;
6 Sheets of Blank Negative Paper; 1 Alphabet Sheet; 1 Package of Card
Mounts; 1 Package of Folding Mounts; 1 Package of "Fixo."
[Illustration]
Contents of Book: Chapter I. Introduction.--Photography.--Magic
Sunshine.--The Outfit.--II. General Instructions.--The Sensitized
Paper.--How the Effects are Produced.--Negatives.--Prints.--Printing
Frames.--Our Printing Frame.--Putting Negatives in Printing
Frame.--Printing.--Developing.--Fixing.--Drying--- Trimming.--Fancy
Shapes.--Mounting.--III. Negatives and How to Make Them.--The
Paper.--Making Transparent Paper.--Making the Negatives.--Printed
Negatives.--Perforated Negatives.--Negatives Made from Magazine
Pictures.--Ground Glass Negatives.--IV. Nature Photography.--Aids to
Nature Study.--Ferns and Leaves.--Photographing Leaves.--Perforating
Leaves.--Drying Leaves, Ferns, etc., for Negatives.--Flowers.--V.
Miscellaneous Photographs.--Magnetic Photographs.--Combination
Pictures.--Initial Pictures.--Name Plates.--Christmas, Easter and
Birthday Cards.
No. R6--"Fun with Photography," Complete Outfit, Postpaid $0.65
FUN WITH CHEMISTRY
[Illustration: Fun With Chemistry]
Chemistry is universally considered to be an interesting subject, even
in school, and it is certainly an important one in these days of
scientific progress. This outfit starts you at the right place and
presents the elements of the subject in a most interesting fashion. The
experiments are so enjoyable that you will take pleasure in doing them
over and over again, and you will want to do them for your friends. You
can have a lot of fun with this set, and even if you have taken advanced
courses in the subject you will find something new in these experiments.
The more you know about chemistry the more you will enjoy it, for then
you can more easily appreciate what a splendid outfit this is for the
money.
The Outfit contains over 20 different articles, including chemicals,
test-tubes, adjustable ring-stand, litmus paper, filter paper, glass
tubing, etc.; in fact, everything needed for the forty-one experiments.
The Book of Instructions is fully illustrated, and measures 5x7-1/2
inches.
Fun Found Here: From White to Black, or the Phantom Ship.--Yellow
Tears.--Smoke Pearls.--An Ocean of Smoke.--A Tiny Whirlwind.--A Smoke
Cascade.--An Explosion in a Teacup.--A Gas Factory in a
Test-Tube.--Making Charcoal.--Flame Goes Over a Bridge.--A Smoke
Toboggan-Slide.--Fountains of Flame.--Making an Acid.--Making an
Alkali.--A Chemical Fight.--Through Walls of Flame.--An Artificial Gas
Well.--A Lampblack Factory.--Steam from a Flame.--The Flame that
Committed Suicide.--Chemical Soup.--A Baby Skating-Rink.--A Magic
Milk-Shake.--The Wizard's Breath.--A Chemical Curtain.--Scrambled
Chemicals.--And Many Other Experiments.
No. R7--"Fun with Chemistry," Complete Outfit, postpaid $0.65
* * * * *
ELECTRIC SHOOTING GAME
Shooting Animals by electricity is certainly a most original game, and
it will furnish a vast amount of amusement to all. The game is patented
and copyrighted--because it is really a brand-new idea in games--and it
brings into use that most mysterious something called electricity. While
the electricity is perfectly harmless, there being no batteries, acids
or liquids, it is very active and you will have plenty to laugh at. It
is so simple that the smallest child can play it and so fascinating that
grandpa will want to try it.
The "game-preserve" is neatly printed in colors, and the birds and wild
animals are well worth hunting. Each has a fixed value--and some of them
must not be shot at all--so there is ample chance for skill.
Tissue-paper bullets are actually shot from the "electric gun" by
electricity, and it is truly a weird sight to see them shoot through the
air impelled by this unseen force.
The Outfit contains the "Game-Preserve," the "Electric Gun," the
"Shooting-Box," and the "Electric Bullets," together with complete
illustrated directions, all placed in a neat box.
No. R41--"Electric Shooting Game," complete, postpaid $0.35
* * * * *
NEW IDEA TIT-TAT-TOE
Splendid game for two, three, or four players; great improvement upon
the good old game; fascinating game instantly learned; nothing better
for children's parties and progressive birthday parties; box with
game-board, 12 men, directions; discount for party orders.
No. R21--New Idea Tit-Tat-Toe, sample, postpaid $0.15
Electric Air-Ships and Other Games
(patented)
[Illustration]
This is the age of air-ships and electricity, so what could be more
up-to-date than electric "air-ships" that will float and dive and race
around at the will of the operator? In this game Mr. St. John has again
made use of a scientific principle, the "air-ships" being actually
controlled by electricity. They are made to act in a most peculiar
manner, with no wires, no fuss, no danger. They are under perfect
control and can be made to ascend to the ceiling, drop to the floor or
race across the room, as desired. You simply can't imagine how
entertaining it is to see a lot of excited people managing these aerial
racers, each eager to win.
The outfit contains illustrated directions and materials for two
players, including the apparatus for producing the electricity and the
"repeller" for managing the "air-ships" in mid-air. The little
"air-ships" are actually made of metal and they can be instantly formed.
Here's the latest sport for all ages, because the little ones can play
too. Get into the game and be an aviator.
No. R42--"Electric Air-Ships and Other Games," postpaid $0.35
AVIATION TOURNAMENTS AT HOME
REAL ELECTRIC TOY-MAKING FOR BOYS
_By THOMAS M. ST. JOHN. Met. E._
This book contains 140 pages and over one hundred
original drawings, diagrams, and full-page plates.
It measures 5x7-1/2 in., and is bound in cloth.
SECOND EDITION Price, postpaid, $1.00
CONTENTS: Chapter I. Toys Operated by Permanent Magnets.--II. Toys
Operated by Static Electricity.--III. Making Electromagnets for
Toys.--IV. Electric Batteries.--V. Circuits and Connections.--VI. Toys
Operated by Electromagnets. VII. Making Solenoids for Toys.--VIII. Toys
Operated by Solenoids.--IX. Electric Motors.--X. Power, Speed, and
Gearing.--XI. Shafting and Bearings.--XII. Pulleys and
Winding-Drums.--XIII. Belts and Cables.--XIV. Toys Operated by Electric
Motors.--XV. Miscellaneous Electric Toys.--XVI. Tools.--XVII.
Materials.--XVIII. Various Aids to Construction.
While planning this book, Mr. St. John definitely decided that he would
not fill it with descriptions of complicated, machine-made instruments
and apparatus, under the name of "Toy-Making," for it is just as
impossible for most boys to get the parts for such things as it is for
them to do the required machine work even after they have the raw
materials.
Great care has been taken in designing the toys which are described in
this book, in order to make them so simple that any boy of average
ability can construct them out of ordinary materials. The author can
personally guarantee the designs, for there is no guesswork about them.
Every toy was made, changed, and experimented with until it was as
simple as possible; the drawings were then made from the perfected
models.
As the result of the enormous amount of work and experimenting which
were required to originate and perfect so many new models, the author
feels that this book may be truly called "Real Electric Toy-Making for
Boys."
* * * * *
Every Boy Should Make Electrical Toys.
A MOTOR THAT CAN DO THINGS
The "St J. Motor No. 1" (List No. 2201) is designed for students and
others who want a small motor for experimental purposes as well as
for all of the work that any small motor can do. We believe this to
be the best small motor made, and we know that it can be used in
more ways than any other motor of equal cost ever built. It has four
binding-posts,--making it possible to energize the field or armature
separately,--and so it can be used in circuits with reversers and
rheostats for experiments. The speed and direction of rotation can be
changed at will, thus adapting it for running toys, etc. As the
binding-posts are mounted upon the frame, this motor can be taken from
the base for remounting and using in many ways, and as it has a
three-pole armature it will start promptly in any position. The shaft
carries a pulley, and a fan can be added at any time. One cell will give
a high speed, and more cells may be added, according to the work it has
to do.
Motor No. 1 stands 3-1/2 inches high. It is finished in black enamel
with nickel-plated trimmings,--strong and well made. With it are
furnished three nickel-plated connecting-straps, which are to be used
for connecting the field and armature in "series" or "shunt." So much
can be done with this motor that it is simply impossible to tell it
here; in fact, it is used as the basis for a whole book of 60
experiments called "The Study of Electric Motors by Experiment," and,
when used in connection with the other parts of the Motor Outfits, it
will give a practical knowledge of motors that no other plan can give.
[Illustration: No. 2201]
These motors and motor outfits have been highly praised by electrical
experts and educators as being invaluable to students. They can do
everything the big motors can do, and if used with the rheostats,
reversers and other apparatus in the outfits, the student will have a
whole motor laboratory.
Why not get a motor that has brains and that can do tricks and
experiments? Any good motor will go when you turn on the power; but that
doesn't mean much when it comes to understanding things.
No. 2201--"St. J. Motor No. 1," with Wiring-Diagrams $1.35
If sent by mail, postage extra, shipping weight one pound.
"ST. J." ELECTRIC MOTOR OUTFIT
These outfits have been designed for students and others who want to do
real experimental work with motors, so as to get right down to the
bottom of the matter and thoroughly master the foundation principles of
the subject. It is simply astonishing to see how much can be learned
with one of these outfits, especially if the work be done as fully
detailed in "The Study of Electric Motors by Experiment." Every
electrical laboratory should have one of these sets, and the more you
know about motors the more you will appreciate an outfit of this kind.
Don't simply read about motors--get right down to the practical part of
it and experiment for yourself. Every experiment will settle an
important point in your mind.
ELECTRIC MOTOR OUTFIT No. 2226X contains everything needed for sixty
interesting and profitable experiments. With the improved apparatus that
we now give we feel that this is the most complete set ever sold for the
money. The following articles are included, packed in a wooden box:
THE "ST. J." MOTOR, fully described on another page, is well called "A
motor that can do things."
THE FIVE-POINT RHEOSTAT is used as a "starting-box" in the
armature-circuit and in various other ways to regulate speed. (See cut.)
THE ELEVEN-POINT RHEOSTAT is used to regulate the "field-magnetism," as
one method of speed-regulation, and for other purposes. (See cut.)
THE DOUBLE-KEY CURRENT REVERSER is, really, a key, a two-point switch,
and a current-reverser combined. On this account it can be used in many
ways, shown in numerous wiring-diagrams. (See cut.)
THE HANDY CURRENT-DETECTOR is used as a current-detector and as a device
for studying the counter-electromotive force of motor while running.
THE TWO-POINT SWITCH is useful in quickly switching the current wherever
it is needed, and for many other experiments.
THE STRAP KEY protects the batteries and closes the circuit.
THE MINIATURE ELECTRIC LAMP AND SOCKET are used in the motor-circuit to
prove certain things and form an attractive addition to the outfit.
THE MAGNETIC NEEDLE in the new outfits is nickel-plated and serves as a
compass for studying the magnetism of the poles, etc.
IN ADDITION to the articles mentioned above, the outfit contains a Set
of Wires for Connections, a Box of Iron-Filings for studying lines of
force, an Experimental Package containing Iron, Steel, etc., three
Connecting-Wires, and
THE BOOK OF INSTRUCTIONS, called "The Study of Electric Motors by
Experiment." This contains 10 chapters, 110 pages, and over 70
illustrations and diagrams. Bound in stiff paper.
BATTERIES are not included, unless ordered extra. Three of our No. 1101
batteries cost 36c., and extra postage for 2 lbs.
No. 2226X--Complete Motor Outfit, as above (P. weight, 3 lbs.) $3.75
* * * * *
THE STUDY OF ELECTRIC MOTORS BY EXPERIMENT
contains Sixty Experiments that Bear Directly upon the Construction,
Operation, and Explanation of Electric Motors, together with Much
Helpful Information upon the Experimental Apparatus Required. This book
will be a great help to those who want to do real experimental work with
motors. It contains 10 chapters, 110 pages, over 70 illustrations and
diagrams, and you can not afford to be without it.
No. R57P--"Study of Motors," bound in paper, postpaid $0.35
No. R57C--"Study of Motors," bound in cloth, postpaid $0.60
Fun With Telegraphy (PATENTED)
TWO GREAT OUTFITS FOR STUDENTS
[Illustration]
These two outfits are similar in construction, although they differ in
details, each being designed for its special work. The "keys,"
"sounders" and "binding-posts" are neatly mounted upon ebonized bases
measuring 6-1/2x3-3/4 in., these also serving as sounding-boards.
"Fun with Telegraphy" is the original low-price telegraph outfit for
students that has sold by the thousands and given universal
satisfaction. It is considered the best 50-cent outfit ever produced,
and, although we have made several improvements lately, the price is the
same as before. In connection with a peculiar oscillating electro-magnet
and a queer anvil, the sounding-board aids in giving out a loud, clear
click that is found elsewhere only in noisy railroad sounders. This
outfit is best adapted for a learner's set of one instrument and a
battery to be used on the table for practising, either with or without
the "codegraph," and not for telegraphing over wires to other stations.
Outfit: Illustrated Book of Instructions, called "Fun with Telegraphy";
Telegraph "Key"; Telegraph "Sounder"; Nickel-Plated "Binding-Posts";
Insulated Wires for Connections.
No. R8--"Fun with Telegraphy," without battery, postpaid $0.50
No. R8, R8B--"Fun with Telegraphy," with one dry battery, postpaid, .65
"Improved Telegraphy No. 2."--In answer to a number of requests for an
improved outfit for regular line work between two stations a few hundred
feet apart, we now offer this set, which is, in general, similar in plan
to our first "Telegraphy No. 2." We have replaced the single
electro-magnet of the old set, as shown in the cut, with two larger ones
of superior construction, thus making the instrument much more
sensitive. The key has also been greatly improved, and we now have a
fine set at low cost.
No expensive gravity batteries are needed with this ingenious
arrangement, as it is designed to work with dry batteries which are
clean and cheap. By means of a peculiar switch, either station may
"call" the other at any time, even though the line is kept on "open
circuit." There is absolutely no waste of current when the line is not
in use--and, even then, only at the instant the dots and dashes are
made. This is certainly a great advantage over the old-fashioned methods
with gravity batteries which amateurs have heretofore been obliged to
use. With this instrument you have a learner's set as well as one that
can be used to send messages to another station. If you do not care for
the superior advantages of "Semi-Wireless," this outfit will give entire
satisfaction for ordinary work.
Outfit: Illustrated Book of Instructions called "Telegraphy Number Two";
Improved Telegraph "Key"; Telegraph "Sounder" with Double
Electromagnets: Special "Switch" for controlling the batteries;
Nickel-plated Screw "Binding-posts"; Insulated Wires for connections.
No. 2307--"Improved Telegraphy Number Two" (no batteries), postpaid,
$1.00
No. 2307B--Same as No. 2307, but with two dry batteries, postpaid, 1.35
The Codegraph (PATENTED)
NOTE--Continental
Code sent unless
otherwise ordered.
[Illustration]
The Codegraph is a brand-new scheme for thoroughly and rapidly learning
the telegraphic code, and it has been worked out with the beginner in
mind. This code-learning system really adapts itself to the beginner,
and it gives a personal touch to each individual student according to
his needs. No other system can do so much, for the student sees, hears
and feels every letter and signal.
The greatest trouble that every one has in learning by listening to
regular messages is in separating the letters and words as they come in
so fast. There is no time to think, and letters pile up in the mind. The
codegraph avoids all confusion because every letter is under perfect
control and may be repeated as many times as desired; hard things can be
made easy; words and sentences can be built at will. We guarantee that
any one of average ability can make rapid improvement with the
codegraph.
What It Is. A complete codegraph outfit, as shown in the cut, has three
main parts: (1) The "plate and pen," (2) some form of "key and sounder"
and (3) two batteries. While any key and sounder can be used with the
plate, we wish to call especial attention to the duplex sounder shown,
as this has been designed to do double work. If you already have "Fun
with Telegraphy," for example, and want to order the "Codegraph Plate
and Pen," we will include, free of charge, an extra attachment for
connecting up your instrument.
The Plate and Pen. When the pen is lightly drawn over the plate, the
sounder responds and shows exactly how every letter and signal should
sound. The student can then practise each letter until perfect. The
surface of the plate is covered with a special insulating enamel, bare
spots corresponding to correct dots and dashes. The polished brass plate
measures about 6x8 inches and has a most elegant appearance. The book
tells all about practising, etc.
Duplex Codegraph Key and Sounder, as shown, has a double action and is
the latest thing in code-learning devices. By the mere turning of a
switch you can have the ordinary telegraph clicks or the wireless
buzzes, making two sounders in one and at the cost of one. The
combination sounder and a substantial key are mounted upon a finely
finished base with nickel-plated trimmings, binding-posts, switch, etc.
If you want to become an operator in the shortest possible time, no
matter whether you have ever tried before or not, get one of these
outfits and begin at once. You will be pleased right from the start,
because you will make rapid progress right from the start.
No. 2350--"Codegraph Plate and Pen," with Book of Instructions $1.00
If sent by mail, postage extra .12
No. 2351--"Duplex Codegraph Key and Sounder" (no batteries) 1.00
If sent by mail, postage extra .10
No. 1102--Two Dry Batteries, as shown .25
If sent by mail, postage extra .10
Special--Complete Codegraph Outfit, as in cut, postpaid 2.50
TELEGRAPH AND TELEPHONE SETS (LIST T)
ORIGINAL OUTFITS that are worthy of your attention and that give fine
results; products of hundreds of experiments and models that give best
value for least money. A complete line of outfits beginning with "Fun
with Telegraphy" and ending with combined "Semi-Wireless Telegraph,
Telephone and Electric Light Signal Sets," with endless possibilities.
Don't forget to add postage according to weight and zone.
List No. List Price
2302--"NEW FUN WITH TELEGRAPHY." A Book, Key, Sounder, Wires. Nicely
mounted, sensitive, adjustable, improved, practical. (P. Wt. 1 lb.)
$0.35
2302B1--Same as No. 2302, but with 1 dry battery. (P. Wt. 1 lb.) $0.50
2308--"NEW TELEGRAPHY NUMBER TWO." For regular line-work: has ingenious
switch; uses dry batteries. Key, Sounder, Book, Wires. (P. Wt. 1 lb.)
$0.75
2308B2--Same as No. 2308 but with two dry batteries. (P. Wt. 2 lbs.)
$1.00
2304--"CLICKERBUZZ" TWO-STATION TELEGRAPH OUTFIT. Special value; loud,
resonant, substantial, very neat and does several things. Complete with
two separate No. 2580 "WONDERBUZZ" Instruments, Morse Code, Continental
Code, Wire for short Line, Pkg. small Telegraph blanks, Instructions and
Wiring Diagrams. (P. Wt. 2 lbs.) $2.00
2304B4--Same as No. 2304 but with four dry batteries. (P. Wt. 3 lbs.)
$2.50
2350--CODEGRAPH PLATE, PEN AND BOOK. Teaches Continental Wireless Code,
giving correct sounds on your buzzer or on ours. Original, practical,
solves home study. (Weight 1 pound.) Price $1.00
2355--CODEGRAPH OUTFIT MOUNTED on ebonized base with High-pitch
Nickel-plated Buzzer, Binding-posts and Key, Books and Wires. Fine set
for practice and study. Continental Code. (Weight, 2 lbs.) Price $2.75
2355B2--Same as 2355, but with 2 batteries. (Wt. 3 lbs.) Price $3.00
2580--"SEMI-WIRELESS WONDERBUZZ," a real wonder that can actually be
used in 40 hookups. A basic instrument around which to build
Code-teaching Devices, Blinker Signal Systems, numerous Click
Telegraphs, Buzz Telegraphs, Semi-wireless Telegraphs, several Telephone
Plans, combined Telegraph and Telephone schemes over the same wire,
actual Room-to-room Wireless, etc., etc. Can't begin to tell it all
here. An all-useful instrument with directions. (Weight, 1 lb.) Price
$1.00
2576--THE "WONDERPHONE" is a practical, inexpensive telephone set;
sensitive, strong and well made. Outfit for one station: Receiver,
Carbon Grain Transmitter, both with flexible wires, Combination
Binding-post and Instrument Support, Battery Box, Wire for Connections,
50 ft. of Line Wire, Directions. (Weight, 1 lb.) Price $1.50
2576B2--Same as No. 2576, but with 2 batteries, (Wt. 2 lbs.) Price
$1.75
2582--"SEMI-WIRELESS TELEGRAPH, TELEPHONE, AND ELECTRIC LIGHT SIGNAL
SET." A Combination of the "Wonderbuzz," the "Wonderphone," Night Signal
Attachment, and a Lot of Extras, Line Wire, Etc. A set that beats them
all and does most. No other system does so much for the money and no
other can do so much for ten times the money. A wonder combination of
usefulness. Please read about the "Wonderbuzz" and the "Wonderphone."
The latest word in telegraphy from Cascade Ranch. (Weight, 2 lbs.) Price
$2.75
2582B2--Same as No. 2582 but with 2 batteries. (Wt. 3 lbs.) $3.00
No. STJC--SAVE-TIME-JIFFY-CODE. Learn to send and receive slowly in an
hour or less. In a day you can telegraph in a jiffy, any message,
punctuation, numbers, sentence-signals and the whole business. Every boy
a telegrapher. Fun to make your own Cipher Codes on this as a basis.
Complete, postpaid 6c., two for $0.10
2425--"DANDY HANDIPHONE." An inexpensive house-to-house telephone.
Sensitive, attractive, practical, efficient. Rings bell or buzzer to
call, using dry batteries. Will work as far as any battery-phone, and
farther than many of them. A dandy Handiphone. In preparation.
Be sure to add postage according to weight and zone.
THOMAS M. ST. JOHN, Cascade Ranch, East Windham, N.Y.