How Two Boys Made Their Own Electrical Apparatus Part 20

FUN WITH CHEMISTRY

[Ill.u.s.tration: 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 fas.h.i.+on. 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, gla.s.s tubing, etc.; in fact, everything needed for the forty-one experiments.

The Book of Instructions is fully ill.u.s.trated, and measures 57-1/2 inches.

Fun Found Here: From White to Black, or the Phantom s.h.i.+p.--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 amus.e.m.e.nt 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 ill.u.s.trated directions, all placed in a neat box.

No. R41--"Electric Shooting Game," complete, postpaid $0.35

NEW IDEA t.i.t-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 t.i.t-Tat-Toe, sample, postpaid $0.15

Electric Air-s.h.i.+ps and Other Games

(patented)

[Ill.u.s.tration]

This is the age of air-s.h.i.+ps and electricity, so what could be more up-to-date than electric "air-s.h.i.+ps" 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-s.h.i.+ps" 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 ill.u.s.trated directions and materials for two players, including the apparatus for producing the electricity and the "repeller" for managing the "air-s.h.i.+ps" in mid-air. The little "air-s.h.i.+ps" 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-s.h.i.+ps 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 57-1/2 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 tr.i.m.m.i.n.gs,--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.

[Ill.u.s.tration: 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, s.h.i.+pping 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 astonis.h.i.+ng 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.