_BY THE SAME AUTHOR._ =FUN WITH MAGNETISM.= A book and complete outfit for _Sixty-One Experiments_. =FUN WITH ELECTRICITY.= A book and complete outfit for _Sixty Experiments_. =FUN WITH PUZZLES.= A book and complete outfit for _Four Hundred Puzzles_. =FUN WITH SOAP-BUBBLES.= A book and complete outfit for _Fancy Bubbles and Films_. =HUSTLE-BALL.= An American game. Played by means of magic wands and polished balls of steel. =JINGO.= The great war game, including =JINGO JUNIOR=. =HOW TWO BOYS MADE THEIR OWN ELECTRICAL APPARATUS.= A book containing complete directions for making all kinds of simple apparatus for the study of elementary electricity. =THE STUDY OF ELEMENTARY ELECTRICITY AND MAGNETISM BY EXPERIMENT.= This book is designed as a text-book for amateurs, students, and others who wish to take up a systematic course of simple experiments at home or in school. _IN PREPARATION._ =THINGS A BOY SHOULD KNOW ABOUT 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. _Ask Your Toy Dealer, Stationer, or Bookseller for our Books, Games, Puzzles, Educational Amusements, Etc._ Thomas M. St. John, 407 West 51st St., New York. The Study of Elementary Electricity and Magnetism by Experiment Containing TWO HUNDRED EXPERIMENTS PERFORMED WITH SIMPLE, HOME-MADE APPARATUS BY THOMAS M. ST. JOHN, Met. E. Author of "Fun With Magnetism," "Fun With Electricity," "How Two Boys Made Their Own Electrical Apparatus," Etc. [Illustration: Logo] NEW YORK THOMAS M. ST. JOHN 407 West 51st Street 1900 Copyright, 1900, By THOMAS M. ST. JOHN. To the Student. This book is designed as a text-book for amateurs, students, and others who wish to take up a systematic course of elementary electrical experiments at home or in school. The student is advised to begin at the beginning, to perform the experiments in the order given, and to understand each step before proceeding. Certain principles and explanations necessarily precede the practical and perhaps more interesting applications of those principles. In selecting the apparatus for the experiments in this book, the author has kept constantly in mind the fact that the average student will not buy the expensive pieces usually described in text-books.