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An Electrical Library.

By PROF. T. O'CONOR SLOANE.

How to become a Successful Electrician.
PRICE $1.oo.

Electricity Simplified.
PRICE, $1.00.

Electric Toy Making, Dynamo Building, etc.

PRICE, $1.00.

Arithmetic of Electricity.

PRICE, $1.00.

Standard Electrical Dictionary.

PRICE, $3.00.

NORMAN W. HENLEY & CO., Publishers,

132 Nassau Street, New York.

A PRACTICAL, TREATISE ON ELECTRICAL CALCULATIONS OF
ALL, KINDS REDUCED TO A SERIES OF RULES, ALL OF THE
SIMPLEST FORMS, AND INVOLVING ONLY ORDINARY ARITH-
METIC, EACH RULE ILLUSTRATED BY ONE OR MORE PRAC-
TICAL PROBLEMS, WITH DETAILED SOLUTION OF EACH,
FOLLOWED BY AN EXTENSIVE SERIES OF TABLES.

BY

T. O'CONOR SLOANE, A.M., E.M., Ph.D.
author or
Standard Electrical Dictionary, Electricity Simplified,
Electric Toy Making, etc.

TweAVTIETH EDITION

NEW YORK :
THE NORMAN W. HENLEY PUBLISHING COMPANY
132 NAssau STREET
I909

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The solution of a problem by arithmetic, although in some cases more laborious than the algebraic method, gives the better comprehension of the subject. Arithmetic is analysis and bears the same relation to algebra that plane geometry does to analytical geometry. Its power is comparatively limited, but it is exceedingly instructive in its treatment of questions to which it applies.

In the following work the problems of electrical engineering and practical operations are investigated on an arithmetical basis. It is believed that such treatment gives the work actual value in the analytical sense, as it necessitates an explanation of each problem, while the adaptability of arithmetic to readers who do not care to use algebra will make this volume more widely available. *

In electricity there is much debatable ground, which has been as far as possible avoided. Some points seem quite outside of the scope of this book, such as the introduction of the time-constant in battery calculations. Again the variation in constants as determined by different authorities made a selection embarrassing. It is believed that some success has been attained in overcoming or compromising difficulties Such as those Suggested.

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