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Electric Lighting and Heating Pocket Book. By SYDNEY F. WALKER.

This book puts in convenient form useful information regarding the apparatus which is likely to be attached to the mains of an electrical company. Tables of units and equivalents are included and useful electrical laws and formulas are stated. 438 pages, 300 engravings. Bound in leather. Pocket book form. Price

$3.00

Electric Wiring, Diagrams and Switchboards. By NEWTON HARRISON, with

additions by THOMAS POPPE.
A thoroughly practical treatise covering the subject of Electric Wiring in all its branches,
including explanations and diagrams which are thoroughly explicit and greatly simplify the
şubject. ..Practical, every-day problems in wiring are presented and the method of obtain-
ing intelligent results clearly shown. Only arithmetic is used. Ohm's law is given a sim-
ple explanation with reference to wiring for direct and alternating currents. The funda-
mental principle of drop of potential in circuits is shown with its various applications. The
simple circuit is developed with the position of mains, feeders and branches; their treatment
as a part of a wiring plan and their employment in house wiring clearly illustrated. Some
simple facts about testing are included in connection with the wiring. Molding and conduit
work are given careful consideration; and switchboards are systematically treated, built up
and illustrated, showing the purpose they serve, for connection with the circuits, and to shunt
and compound wound machines. The simple principles of switchboard construction, the
development of the switchboard, the connections of the various instruments, including the
lightning arrester, are also plainly set forth.
Alternating current wiring is treated, with explanations of the power factor, conditions calling
for various sizes of wire, and a simple way of obtaining the sizes for single-phase, two-phase
and three-phase circuits. This is the only complete work issued showing and telling you what
you should know about direct and alternating current wiring. It is a ready reference. The
work is free from advanced technicalities and mathematics, arithmetic being used throughout.
It is in every respect a handy, well-written, instructive, comprehensive volume on wiring
for the wireman, foreman, contractor, or electrician. 2nd Revised Edition. 303 pages, 130
illustrations. Price

$1.50

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Electric Furnaces and their Industrial Applications. By J. WRIGHT.

This is a book which will prove of interest to many classes of people; the manufacturer who desires to know what product can be manufactured successfully in the electric furnace, the chemist who wishes to post himself on the electro-chemistry, and the student of science who merely looks into the subject from curiosity. New, Revised and Enlarged Edition. 320 pages. Fully illustrated, cloth. Price

$3.00

Electric Toy Making, Dynamo Building, and Electric Motor Construetion.

By Prof. T. O'CONOR SLOANE.
This work treats of the making at home of electrical toys, electrical apparatus, motors, dynamos,
and instruments in general, and is designed to bring within the reach of young and old the
manufacture of genuine and useful electrical appliances. The work is especially designed for
amateurs and young folks.
Thousands of our young people are daily experimenting, and busily engaged in making elec-
trical toys and apparatus of various kinds. The present work is just what is wanted to give
the much needed information in a plain, practical manner, with illustrat

to make easy the carrying out of the work. 20th Edition. Price .

$1.00

Electricity Simplified. By Prof. T. O'CONOR SLOANE.

The object of "Electricity Simplified" is to make the subject as plain as possible and to show what the modern conception of electricity is; to show how two plates of different metal, immersed in acid, can send a message around the globe; to explain how a bundle of copper wire rotated by a steam engine can be the agent in lighting our streets, to tell what the volt, ohm and ampere are, and what high and low tension mean; and to answer the questiona that perpetually arise in the mind in this age of electricity. 13th Edition. 172 pages. Illustrated. Frice

$1.00

House Wiring. By THOMAS W. POPPE.

This work describes and illustrates the actual installation of Electric Light Wiring, the manner in which the work should be done, and the method of doing it. The book can be conveniently carried in the pocket. It is intended for the Electrician, Helper and Apprentice. It solves all Wiring. Problems and contains nothing that conflicts with the rulings of the National Board of Fire Underwriters. It gives just the information essential to the Successful Wiring of a Building. Among the subjects treated are: Locating the Meter. PanelBoards. Switches. Plug Receptacles. Brackets. Ceiling Fixtures. The Meter Connections. The Feed Wires. The Steel Armored Cable System. The Flexible Steel Conduit System. The Ridig Conduit System. A digest of the National Board of Fire Underwriters rules relating to metallic wiring systems. Various switching arrangements explained and diagrammed The easiest method of testing the Three- and Four-way circuits explained. The grounding of all metallic wiring systems and the reason for doing so shown and explained. The insulation of the metal parts of lamp fixtures and the reason for the same described and illustrated.

2nd Edition, revised and enlarged. Fully illustrated. Flexible cloth. Price

50 cents

125 pages.

How to Become a Successful Electrician. By Prof. T. O'CONOR SLOANE.

Every young man who wishes to become a successful electrician should read this book. It tells in simple language the surest and easiest way to become a successful electrician. The studies to be followed, methods of work, field of operation and the requirements of the successful electrician are pointed out and fully explained. Every young engineer will find this an excellent stepping stone to more advanced works on electricity which he must master before success can be attained. Many young men become discouraged at the very outstart by attempting to read and study books that are far beyond their comprehension. This book serves as the connecting link between the rudiments taught in the public schools and the real study of electricity. It is interesting from cover to cover. 18th Revised Edition, just issued. 205 pages. Illustrated. Price

$1.00

Management of Dynamos. By LUMMIS-PATERSON.

A handbook of theory and practice. This work is arranged in three parts. The first part covers the elementarv theory of the dynamo. The second part, the construction and action of the different classes of dynamos in common use are described; while the third part relates to such matters as affect the practical management and working of dynamos and motors. 4th Edition. 292 pages, 117 illustrations. Price

$1.50

Practical Electricity. By Prof. T. O’CONOR SLOANE.

This work of 768 pages was previously known as Sloane's Electricians' Hand Book, and is intended for the practical electrican who has to make things go. The entire field of electricity is covered within its pages. Among some of the subjects treated are: The Theory of the Electric. Current and Circuit, Electro-Chemistry, Primary Batteries, Storage Batteries, Generation and Utilization of Electric Powers, Alternating Current, Armature Winding, Dynamos and Motors, Motor Generators, Operation of the Central Station Switchboards, Safety Appliances, Distribution of Electric Light and Power, Street Mains, Transformers, Arc and Incandescent Lighting, Electric Measurements, Photometry, Electric Railways, Telephony, Bell-Wiring, Electric-Plating, Electric Heating, Wireless Telegraphy, etc. It contains no useless theory; everything is to the point. It teaches you just what you want to know about electricity. It is the standard work published on the subject. Forty-one chapters, 556 engravings. Price :

$2.50

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Switchboards. By WILLIAM BAXTER, JR.

This book appeals to every engineer and electrician who wants to know the practical side of things. It takes up all sorts and conditions of dynamos, connections and circuits, and shows by diagram and illustration just how the switchboard should be connected. Includes direct and alternating current boards, also those for arc lighting, incandescent and power circuits. Special treatment on high voltage boards for power transmission. 2nd Edition. 190 pages, Illustrated. Price

$1.50

1

Standard Electrical Dictionary. By T. O'CONOR SLOANE.

An indispensable work to all interested in electrical science. Suitable alike for the student
and professional. A practical handbook of reference containing definitions of about 5,000
distinct words, terms and phrases. The definitions are terse and concise and include every
term used in electrical science. Recertly issued. An entirely new edition. Should be in the
possession of all who desire to keep abreast with the progress of this branch of science. In
its arrangement and typography the book is very convenient. The word or term defined is
printed in black-faced type, which readily catches the eye, while the body of the page is in
smaller but distinct type. The definitions are well worded, and so as to be understood by the
non-technical reader. The general plan seems to be to give an exact, concise definition, and
then amplify and explain in a more popular way. Synonyms are also given, and references
to other words and phrases are made. A very complete and accurate index of fifty pages
is at the end of the volume; and as this index contains all synonyms, and as all phrases are
indexed in every reasonable combination of words, reference to the proper place in the body
of the book is readily made. It is difficult to decide how far a book of this character is to
keep the dictionary form, and to what extent it may assume the encyclopedia form. For
some purposes, concise, exactly worded definitions are needed; for other purposes, more
extended descriptions are required. This book seeks to satisfy both demands, and does it
with considerable success. 682 pages, 393 illustrations. 12th Edition.
Price

$3.00

Storage Batteries Simplified. By Victor W. Pagk, M.E.

A complete, treatise on storage battery operating principles, repairs and applications, The greatly increasing application of storage batteries in modern engineering and mechanical work has created a demand for a book that will consider this subject completely and exclusively. This is the most thorough and authoritative treatise ever published on this subject. It is written in easily understandable, non-technical language so that any one may grasp the basic principles of storage battery action as well as their practical industrial applications. All electric and gasoline automobiles use storage batteries. Every automobile repairman, dealer or salesman should have a good knowledge of maintenarice and repair of these important elements of the motor car mechanism.

This book not only tells how to charge, care for and rebuild storage batteries but also outlines all the industrial uses. Learn how they run street cars, locomotives and factory trucks. Get an understanding of the important functions they perform in submarine boats, isolated lighting plants, railway switch and signal systems, marine applications, etc. This book tells how they are used in central station standby service, for starting automobile motors and in ignition systems. Every practical use of the modern storage battery is outlined in this treatise. 320 pages, fully illustrated. Price $1.50

Telephone Construction, Installation, Wiring, Operation and Maintenance.

By W. H. RADCLIFFE and H. C. Cushing.
This book is intended for the amateur, the wireman, or the engineer who desires to establish
a means of telephonic communication between the rooms of his home, office, or shop. It
deals only with such things as may be of use to him rather than with theories.
Gives the principles of construction and operation of both the Bell and Independent instru-
ments; approved methods of installing and wiring them; the means of protecting them
from lightning and abnormal currents; their connection together for operation as series or
bridging stations; and rules for their inspection and maintenance. Line wiring and the wiring
and operation of special telephone systems are also treated. Intricate mathematics are
avoided, and all apparatus, circuits and systems are thoroughly described. The appendix
contains definitions of units and terms used in the text. Selected wiring tables, which are very
helpful, are also included. Among the subjects treated are Construction, Operation, and
Installation of Telephone Instruments; Inspection and Maintenance of Telephone Instru-
ments; Telephone Line Wiring; Testing Telephone Line Wires and Cables; Wiring and
Operation of Special Telephone Systems, etc. 2nd Edition, Revised and Enlarged. 223
pages, 154 illustrations

$1.00

Wiring a House. By HERBERT PRATT.

Shows a house already built; tells just how to start about wiring it; where to begin; what wire to use; how to run it according to Insurance Rules; in fact, just the information yov need. Directions apply equally to a shop. 4th Edition.

25 cents

Price.

1

Wireless Telegraphy and Telephony Simply Explained. By ALFRED P.

MORGAN.
This is undoubtedly one of the most complete and comprehensible treatises on the subjeot
ever published, and a close study of its pages will enable one to master all the details of the
. wireless transmission of messages. The author has filled a long-felt want and has succeeded
in furnishing a lucid, comprehensible explanation in simple language of the theory and practice
of wireless telegraphy and telephony.
Among the contents are: Introductory; Wireless Transmission and Reception—The Aerial
System, Earth Connections—The Transmitting Apparatus, Spark Coils and Transformers,
Condensers, Helixes, Spark Gaps, Anchor Gaps, Aerial Switches—The Receiving Apparatus,
Detectors, etc.-Tuning and Coupling, Tuning Coils, Loose Couplers, Variable Condensers,
Directive Wave Systems-Miscellaneous Apparatus, Telephone Receivers, Range of Stations
Static Interference - Wireless Telephones, Sound and Sound Waves, The Vocal Cords ani
Ear-Wireless Telephone, How Sounds Are Changed into Electric Waves-Wireless Tele-
phones, The Apparatus--Summary. 154 pages, 156 engravings. Price

$1.00

FACTORY MANAGEMENT, ETC.

Modern Machine Shop Construction, Equipment and Management. By

O. E. PERRIGO, M.E.
The only work published that describes the modern machine shop or manufacturing plant
from the time the grass is growing on the site intended for it until the finished product is
shipped. By a careful study of its thirty-two chapters the practical man may economically
build, efficiently equip, and successfully manage the modern machine shop or manufacturing
establishment. Just the book needed by those contemplating the erection of modern shop
buildings, the rebuilding and reorganization of old ones, or the introduction of modern shop
methods, time and cost systems. It is a book written and illustrated by a practical shop
man for practical shop men who are too busy to read theories and want facts. It is the most
complete all-around book of its kind ever published. It is a practical book for practical men,
from the apprentice in the shop to the president in the office. It minutely describes and il-
lustrates the most simple and yet the most efficient time and cost system yet devised. 2nd
Revised and Enlarged Edition, just issued. 384 pages, 219 illustrations. Price.

$5.00

FUEL

Combustion of Coal and the Prevention of Smoke. By Wm. M. BARR.

This book has been prepared with special reference to the generation of heat by the com-
bustion of the common fuels found in the United States, and deals particularly with the con-
ditions necessary to the economic and smokeless combustion of bituminous coals in Stationary
and Locomotive Steam Boilers.
The presentation of this important subject is systematic and progressive. The arrangement
of the book is in a series of practical questions to which are appended accurate answers, which
describe in language, free from technicalities, the several processes involved in the furnace
combustion of American fuels; it clearly states the essential requisites for perfect combustion,
and points out the best methods for furnace construction for obtaining the greatest quantity
of heat from any given quality of coal. Nearly 350 pages, fully illustrated. Price $1.00

Smoke Prevention and Fuel Economy. By Booth and KERSHAW.

A complete treatise for all interested in smoke prevention and combustion, being based un
the German work of Ernst Schmatolla, but it is more than a mere translation of the German
treatise, much being added. The authors show as briefly as possible the principles of fuel
combustion, the methods which have been and are at present in use, as well as the proper
scientific methods for obtaining all the energy in the coal and burning it without smoke.
Considerable space is also given to the examination of the waste gases, and several of the
representative English and American mechanical stoker and similar appliances are described.
The losses carried away in the waste gases are thoroughly analyzed and discussed in the Ap-
pendix, and abstracts are also here given of various patents on combustion apparatus. The
book is complete and contains much of value to all who have charge of large plants. 194 pages.
Illustrated. Price

$2.50

GAS ENGINES AND GAS

Gas, Gasoline and Oil Engines. By GARDNER D. Hiscox. Revised by

VICTOR W. PAGÉ, M.E.
Just issued New 1918 Edition, Revised and Enlarged. Every user of a gas engine needs
this book. Simple, instructive and right up-to-date. The only complete work on the subject.
Tells all about internal combustion engineering, treating exhaustively on the design, con-
struction and practical application of all forms of gas, gasoline, kerosene and crude petroleum
oil engines. Describes minutely all auxiliary systems, such as lubrication, carburetion and
ignition. Considers the theory and management of all forms of explosive motors for sta-
tionary and marine work, automobiles, aeroplanes and motor-cycles. "Includes also Producer
Gas and Its Production. Invaluable instructions for all students, gas-engine owners, gas-
engineers, patent experts, designers, mechanics, draftsmen and all having to do with the
modern power.

Illustrated by over 400 engravings, many specially made from engineering drawings, all in correct proportion. 650 pages, 435 engravings. Price . $2.50 net

The Gasoline Engine on the Farm: Its Operation, Repair and Uses. Ву

XENO W. PUTNAM.
This is a practical treatise on the Gasoline and Kerosene Engine intended for the man who
wants to know just how to manage his engine and how to apply it to all kinds of farm work
to the best advantage.
This book abounds with hints and helps for the farm and suggestions for the home and house-
wife. There is so much of value in this book that it is impossible to adequately describe it
in such sinall space. Suffice to say that it is the kind of a book every farmer will appreciate
and every farm home ought to have. Includes selecting the most suitable engine for farm
work, its most convenient and efficient installation, with chapters on troubles, their remedies,
and how to avoid them. The care and management of the farm tractor in plowing, harrowing,
harvesting and road grading are fully covered: also plain directions are given for handling.
the tractor on the road. Special attention is given to relieving farm life of its drudgery by
applying power to the disagreeable small tasks which must otherwise be done by hand. Many
home-made contrivances for cutting wood, supplying kitchen, garden, and barn with water,
loading, hauling and unloading hay, delivering grain to the bins or the feed trough are in-
cluded; also full directions for making the engine milk the cows, churn, wash, sweep the
house and clean the windows, etc. Very fuily illustrated with drawings of working parts and
cuts showing Stationary, Portable and Tractor Engines doing all kinds of farm work. All
money-making farms utilize power. Learn how to utilize power by reading the pages of this.
book. It is an aid to the result getter, invaluable to the up-to-date farmer, student, black-
smith, implement dealer and, in fact, all who can apply practical knowledge of stationary
gasoline engines or gas tractors to advantage. 530 pages. Nearly 180 engravings. Price $2.00

WHAT IS SAID OF THIS BOOK: "Am much pleased with the book and find it to be very complete and up-to-date. I will heartily recommend it to students and farmers whom I think would stand in need of such a. work, as I think it is an exceptionally good one."—N. S. Gardiner, Prof. in Charge, Clemson Agr. College of S. C.; Dept. of Agri. and Agri. Exp. Station, Clemson College, S. C. "I feel that Mr. Putnam's book covers the main points which a farmer should know."-R. T. Burdick, Instructor in Agronomy, University of Vermont, Burlington, Vt.

Gasoline Engines: Their Operation, Use and Care. By A. HYATT VERRILL.

The simplest, latest and most comprehensive popular work published on Gasoline Engines, describing what the Gasoline Engine is; its construction and operation; how to install it; how to select it; how to use it and how to remedy troubles encountered. Intended for Owners, Operators and Users of Gasoline Motors of all kinds. This work fully describes and illustrates the various types of Gasoline Engines used in Motor Boats, Motor Vehicles and Stationary Work. The parts, accessories and appliances are described with chapters on ignition, fuel, lubrication, operation and engine troubles. Special attention is given to the care, operation and repair of motors, with useful hints and suggestions on emergency repairs and makeshifts. A complete glossary of technical terms and an alphabetically arranged table of troubles and their symptoms form most valuable and unique features of this manual. Nearly every illustration in the book is original, having been made by the author. Every page is full of interest and value. A book which you cannot afford to be without. 275 pages, 152 specially made engravings. Price.

$1.50

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