paratus were made. In his book Mr. St. John
has given directions in simple language for making and using these
devices, and has illustrated these directions with admirable
diagrams and cuts. The little volume is unique, and will prove
exceedingly helpful to those of our young readers who are fortunate
enough to possess themselves of a copy. For schools where a course
of elementary science is taught, no better text-book in the first
steps in electricity is obtainable."--The Great Round World.

Exhibit of Experimental Electrical Apparatus

AT THE ELECTRICAL SHOW, MADISON SQUARE GARDEN, NEW YORK.

While only 40 pieces of simple apparatus were shown in this exhibit, it
gave visitors something of an idea of what young boys can do if given
proper designs.

[Illustration:

"HOW TWO BOYS MADE THEIR OWN ELECTRICAL APPARATUS"
Gives Proper Designs--Designs for over 150 Things.]

BY THE SAME AUTHOR--(LIST R)

LIST NO. LIST PRICE

R1--FUN WITH MAGNETISM. A book and complete outfit of apparatus for
sixty-one experiments. Weight 4 ounces. Price $0.35

R2--FUN WITH ELECTRICITY. A book and complete outfit of apparatus for
sixty experiments. Weight 1 pound. Price $0.65

R3--FUN WITH PUZZLES. A book and complete outfit for four hundred
puzzles with key to them. One pound. Price $0.35

R4--FUN WITH SOAP-BUBBLES. A book and complete outfit of apparatus for
fancy bubbles and films. One pound. Price $0.35

R5--FUN WITH SHADOWS. A book and complete outfit of apparatus for shadow
pictures, pantomimes, etc. One pound. Price $0.35

R6--FUN WITH PHOTOGRAPHY. A book and complete outfit of apparatus for
amateur work. One pound. Price $0.65

R7--FUN WITH CHEMISTRY. A book and complete outfit of apparatus for
forty-one experiments. One pound. Price $0.65

R41--ELECTRIC SHOOTING GAME. Absolutely harmless; fascinating. Paper
bullets shot by electricity. One pound. Price $0.35

R42--ELECTRIC AIR-SHIPS AND OTHER GAMES. Great fun. Get into the game;
be an aviator at home; for two players. One pound. Price $0.35

R43--ELECTRIC FORTUNE-TELLER tells a lot. Mysteriously electric. Comic
and otherwise. In preparation. One pound. Price $0.35

R51--HOW TWO BOYS MADE THEIR OWN ELECTRICAL APPARATUS. A book containing
complete directions for making many kinds of electrical apparatus.
Seventh edition; 141 pages; cloth. Price $1.00

R52--THE STUDY OF ELEMENTARY ELECTRICITY AND MAGNETISM BY EXPERIMENT. A
text-bo