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The King of all. The Companion volume to Modern Wiring Diagrams

JUST FROM THE PRESS ELECTRICAL WIRING and CONSTRUCTION TABLES

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By HENRY C. HORSTMANN and VICTOR H. TOUSLEY
Contains hundreds of easy up-to-date tables covering everything on Electric
Wiring. Bound in full Persian Morocco. Pocket size. Round corners, red edges.

PRICE, NET, $1.50

THIS BOOK CONTAnt calculations. Trents required wand by a ver
Tables for direct show at all leo, melengde: also the propostem of

Tables for direct current calculations. Tables for alternating curront calculations.

These tables show at a glance the currents required with any of the systems in general use, for any voltage, efficiency, or power-factor, and by a very simple cal.

culation (which can be mentally made) also the proper wire for any loss. Tables showing the smallest wire permissible with any system or number of H. P. or

lights under National Electrical Code." Very convenient for Contractors. Tables for calculating the most economical loss. Tables and diagrams showing the proper size of conduits to accommodate all neces

sary combinations or numbers of wires. Tables and data for estimating at a glance the quantity of material required in

different lines of work.

As this is intended for a pocket hand-book everything that would make it un. necessarily cumbersome has been omitted. There is no padding. Every page 18 valuable and a time saver. This book can be used every day by the wire-man, the con. tractor, engineer and architect. All parts are so simple that very little knowledge 18 required to understand them.

OTHER IMPORTANT WORKS BY THESE AUTHORS Modern Wiring Diagrams & Descriptions, price -

$1.50

Modern Electrical Constructions, price -

$1.50 The 3 above volumes in a box. Special price complete, •

$4.00 OUR GUARANTEE If any of these books are not worth ten times the amount asked, return them and get your money back. Sent all charges prepaid to any address upon receipt of price.

Our 1907 Catalogue now ready. Sent free.

FREDERICK J. DRAKE & CO., Publishers, 350-352 Wabash Ave., CHICAGO, U. S. A. In ordering please mention this paper

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ITS METALLURGY AND MECHANICAL TREATMENT

By Harbord and Hall, in the Metallurgical Series Edited by W. Roberts-Austen

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Containing 758 pages, 37 folding plates, 100 microsec- &
tions from photographs, and 270 illustrations in the text,

Net
THE OBJECT of the present work is to furnish a full description

of the various branches of steel manufacture, both
from a metallurgical and an engineering standpoint, as well as to discuss the
physics and chemistry of steel in relation to its manufacture. The work has been
divided into four sections: the Manufacture of Steel, Reheating, the Mechanical
Treatment of Steel, and Finished Steel :: :: :: :: :: :: ::

J. B. LIPPINCOTT COMPANY, Publishers,

PHILADELPHIA

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50 Cents Reference Library

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This magnificent work-costing $750,000 to produce-is a Dictionary and an Encyclopedia combined. In fullness of definitions, number of words defined and accuracy, it is superior to reference works selling for five times its price. We have obtained a limited number of sets which we will close out at half price on the easy monthly-payment plan. We send the complete work to your home for examination, without charge,

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The set contains 5,000 pages, 250,000 words, 3,000 illustrations, and 50,000 encyclopedic articles. There are three styles of bindingfull sheep, half-leather, and fine library cloth. We recommend the half-leather for ordinary use, and the full sheep for those who desire a set bound in luxurious style. In printing, paper, illustrations, and binding, this work is so nearly perfect that it is worthy of a place in the library of the most fastidious book-lover.

Greatest Dictionary Bargain Ever Offered As a Dictionary this work defines 25,000 more words than any other Dictionary and every definition is so clear a school boy can understand it.

As an Encyclopedia it treats 50,000 subjects in an encyclopedic manner and this vast array of articles covers the whole field of human knowledge.

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Free for Examination

The limited edition that we control will be closed out to prompt purchasers at slightly more than one-third the publishers' price.' For instance, the half-morocco binding-our price $20.50—has been widely sold at $56.00 a set, and it is considered by expert judges to be worth the money. Prompt action on your part is necessary to be sure of a set on these terms.

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