Produced by James Simmons. This file was produced from page images at the Internet Archive. Transcriber’s Note This book was transcribed from scans of the original found at the Internet Archive. The page scans were done by Google. The original book was done as three volumes, but the edition I have transcribed put all three volumes together as a clothbound book. As a result it had three identical prefaces and duplicated ads. I have included one preface, at the beginning, and put the ads at the end of the book. I have rotated a couple of illustrations. Arts and Science Series No. 7 Home-made Electrical Apparatus A Practical Handbook for Amateur Experimenters In Three Parts *Volume I* _Second Edition_ *BY* *A. M. Powell* PUBLISHED BY COLE & MORGAN, Inc. Publishers of the Arts and Science Series P.O. BOX 473 CITY HALL STATION NEW YORK, N. Y. Printed in U. S. A. Copyright 1918 by COLE & MORGAN, Inc. PREFACE The purpose of this book is to aid the young experimenter in building and operating his own electrical apparatus and instruments. Every boy of now-a-days experiments with electricity and the right sort of book which furnishes him with ideas gets close to his heart. Of books upon electricity there is no end. That is granted. But there are very few _practical_ books for the young experimenter who wishes to construct miscellaneous electrical apparatus for his own amusement and instruction which really amounts to something and which is worth his pains when the labor has been finished. This book is therefore offered as a volume of instruction for making all sorts of batteries, rectifiers, motors, etc., which are entirely out of the toy class and yet are not so elaborate that they cannot be easily constructed _at home_ by the average boy who is willing to put a little care into his work. The materials required are such that they can he procured without any great expense.