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The King of all. The Companion volume to Modern Wiring Diagrams
JUST FROM THE PRESS ELECTRICAL WIRING and CONSTRUCTION TABLES
By HENRY C. HORSTMANN and VICTOR H. TOUSLEY
PRICE, NET, $1.50
THIS BOOK CONTAnt calculations. Trents required wand by a ver
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 -
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.
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ITS METALLURGY AND MECHANICAL TREATMENT
By Harbord and Hall, in the Metallurgical Series Edited by W. Roberts-Austen
Containing 758 pages, 37 folding plates, 100 microsec- &
of the various branches of steel manufacture, both
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