FIRST DIRECT-CONNECTED ELECTRIC GENERATOR UNIT OF LARGE CAPACITY EVER CONSTRUCTED UP TO THE TIME IT WAS MADE BY THOMAS A. EDISON IN JUNE, 1881. CAPACITY, 1200 INCANDESCENT LAMPS OF 16 CANDLE-POWER EACH

A-B-C
OF
ELECTRICITY

BY
WILLIAM H. MEADOWCROFT

HARPER & BROTHERS PUBLISHERS

NEW YORK & LONDON

A-B-C of Electricity

COPYRIGHT, 1888, 1909, BY WILLIAM H. MEADOWCROFT

COPYRIGHT, 1915, BY HARPER & BROTHERS
PRINTED IN THE UNITED STATES OF AMERICA
PUBLISHED MAY, 1915

From the Laboratory of Thomas A. Edison

Orange, N. J.

Mr. W. H. Meadowcroft,

New York City.

DEAR SIR:

I have read the MS. of your "A-B-C of Electricity," and find that the statements you have made therein are correct. Your treatment of the subject, and arrangement of the matter, have impressed me favorably.

Yours truly,

THOS. A. EDISON

[CONTENTS]

CHAP. PAGE
Introduction To New Edition[viii]
Preface[x]
I. [1]
II.Definitions[3]
III.Magnetism[16]
IV.The Telegraph[23]
V.Wireless Telegraphy[33]
VI.The Telephone[40]
VII.Electric Light[54]
VIII.Electric Power[87]
IX.Batteries[95]
X.Conclusion[127]