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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. 125 pages.
2nd Edition, revised and enlarged. Fully illustrated. Flexible cloth. Price
50 cents WHAT IS SAID OF THIS BOOK: “The information given is exact and exhaustive without being too technical or over
laden with details." —Druggists' Circular. HOW TO BECOME A SUCCESSFUL ELECTRICIAN. By Prof. T. O'CONOR
205 pages. Illustrated. Price
$1.00 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. Recently 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. Complete, concise and convenient. 682 pages. 393 illustrations. Twelfth Edition. Price
$3.00 SWITCHBOARDS. By WILLIAM BAXTER, JR.
This book appeals to every engineer and electrician who wants to know the practical
$1.50 TELEPHONE CONSTRUCTION, INSTALLATION, WIRING, OPERATION
AND MAINTENANCE. By W. H. RADCLIFFE and H. C. CUSHING.
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 Instruments; 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 WIRELESS TELEGRAPHY AND TELEPHONY SIMPLY EXPLAINED. By
ALFRED P. MORGAN.
$1.00 WHAT IS SAID OF THIS BOOK: “This book should be in both the home and school library.”—The Youths' Instructor. 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 you need. Directions apply equally to a shop. Fourth edition 25 cents
FACTORY MANAGEMENT, ETC.
MODERN MACHINE SHOP CONSTRUCTION, EQUIPMENT AND MANAGE
MENT. By 0. E, PERRIGO, M.E.
COMBUSTION OF COAL AND THE PREVENTION OF SMOKE. By WM. M.
RR. This book has been prepared with special reference to the generation of heat by the combustion of the common fuels found in the United States, and deals particularly with the conditions 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 .
GAS ENGINES AND GAS
THE GASOLINE ENGINE ON THE FARM: ITS OPERATION, REPAIR AND
USES. By XENO W. PUTNAM.
GASOLINE ENGINES: THEIR OPERATION, USE AND CARE. By A. HYATT
275 pages. 152 specially made engravings. Price
GAS, GASOLINE, AND OIL ENGINES. By GARDNER D. Hiscox.
Just issued, 21st revised and enlarged edition. 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 the running and management of gas, gasoline and oil engines, as designed and manufactured in the United States. Explosive motors for stationary marine and vehicle power are fuily treated, together with illustrations of their parts and tabulated sizes, also their care and running are included. Electric ignition by induction coil and jump spark are fully explained and illustrated, including valuable information on the testing for economy and power and the erection of power plants.
The rules and regulations of the Board of Fire Underwriters in regard to the installation and management of gasoline motors is given in full, suggesting the safe installation of explosive motor power. A list of United States Patents issued on gas, gasoline, and oil engines and their adjuncts from 1875 to date is included.
435 engravings. Folding plates. Price
$2.50 GAS ENGINE CONSTRUCTION, OR HOW TO BUILD A HALF-HORSE
POWER GAS ENGINE. By PARSELL and WEED.
$2.50 HOW TO RUN AND INSTALL GASOLINE ENGINES. By C. Von CULIN.
Revised and enlarged edition just issued. The object of this little book is to furnish a pocket instructor for the beginner, the busy man who uses an engine for pleasure or profit, but who does not have the time or inclination for a technical book, but simply to thoroughly understand how to properly operate, install and care for his own engine. The index refers to each trouble, remedy, and subject alphabetically. Being a quick reference to find the cause, remedy and prevention for troubles, and to become an expert with his own engine. Pocket size. Paper binding. Price
25 cents MODERN GAS ENGINES AND PRODUCER GAS PLANTS. By R. E. MATHOT.
A guide for the gas engine designer, user, and engineer in the construction, selection, purchase, installation, operation, and maintenance of gas engines. More than one book on gas engines has been written, but not one has thus far even encroached on the field covered by this book. Above all Mr. Mathot's work is a practical guide. Recognizing the need of a volume that would assist the gas engine user in understanding thoroughly the motor upon which he depends for power, the author has discussed his subject without the help of any mathematics and without elaborate theoretical explanations. Every part of the gas engine is described in detail, tersely, clearly, with a thorough understanding of the requirements of the mechanic. Helpful suggestions as to the purchase of an engine, its installation, care, and operation, form a most
valuable feature of the work. 320 pages. 175 detailed illustrations. Price . $2.50 THE MODERN GAS TRACTOR. By VICTOR W. Pagé.
A complete treatise describing all types and sizes of gasoline, kerosene and oil tractors. Considers design and construction exhaustively, gives complete instructions for care, operation and repair, outlines all practical applications on the road and in the field. The best and latest work on farm tractors and tractor power plants. A work needed by farmers, students, blacksmiths, mechanics, salesmen, implement dealers, designers and engineers. 500 pages. Nearly 300 illustrations and folding plates. Price $2.00
GEARING AND CAMS
BEVEL GEAR TABLES. By D. AG. ENGSTROM.
Does away with all the trigonometry and fancy figuring on bevel gears, and makes it easy for anyone to lay them out or make them just right. There are 36 full-page tables that show every necessary dimension for all sizes or combinations you're apt to need. No puzzling, figuring or guessing. Gives placing distance, all the angles (including cutting angles), and the correct cutter to use. A copy of this prepares you for anything in the bevel-gear line. 3d Edition.
$1.00 CHANGE GEAR DEVICES. By Oscar E. PERRIGO.
A practical book for every designer, draftsman, and mechanic interested in the invention and development of the devices for feed changes on the different machines requiring such mechanism. All the necessary information on this subject is taken up, analyzed, classified, sifted, and concentrated for the use of busy men who have not the time to go through the masses of irrelevant matter with which such a subject is usually encumbered and select such information as will be useful to them.
It shows just what has been done, how it has been done, when it was done, and who did it. It saves time in hunting up patent records and re-inventing old ideas. 88 pages.
DRAFTING OF CAMS. By Louis ROUILLION.
The laying out of cams is a serious problem unless you know how to go at it right. This puts you on the right road for practically any kind of cam you are likely to run up against. 3d Edition.
25 cents HYDRAULICS
HYDRAULIC ENGINEERING. By GARDNER D. Hiscox.
A treatise on the properties, power, and resources of water for all purposes. Including the measurement of streams, the flow of water in pipes or conduits; the horse-power of falling water, turbine and impact water-wheels, wave motors, centrifugal, reciprocating and air-lift pumps. With 300 figures and diagrams and 36 practical tables. All who are interested in water-works development will find this book a useful one, because it is an entirely practical treatise upon a subject of present importance, and cannot fail in having a far-reaching influence, and for this reason should have a place in the working library of every engineer. Among the subjects treated are: Historical Hydraulics, Properties of Water, Measurement of the Flow of Streams; Flow from Sub-surface Orifices and Nozzles; Flow of Water in Pipes; Siphons of Various Kinds; Dams and Great Storage Reservoirs; City and Town Water Supply; Wells and Their Reinforcement; Air Lift Methods of Raising Water; Artesian Wells; Irrigation of Arid Districts; Water Power; Water Wheels; Pumps and Pumping Machinery; Reciprocating Pumps; Hydraulic Power Transmission; Hydraulic Mining; Canals; Ditches; Conduits and Pipe Lines; Marine Hydraulics; Tidal and Sea Wave Power, etc. 320 pages. Price :
INVENTORS' MANUAL, HOW TO MAKE A PATENT PAY.
This is a book designed as a guide to inventors in perfecting their inventions, taking
KNOTS, SPLICES AND ROPE WORK. By A. HYATT VERRILL.
This is a practical book giving complete and simple directions for making all the most useful and ornamental knots in common use, with chapters on Splicing, Pointing, Seizing, Serving, etc. This book is fully illustrated with one hundred and fifty original engravings, which show how each knot, tie or splice is formed, and its appearance when finished. The book will be found of the greatest value to Campers, Yachtsmen, Travelers, Boy Scouts, in fact, to anyone having occasion to use or handle rope or knots for any purpose, The book is thoroughly reliable and practical, and is not only a guide, but a teacher. It is the standard work on the subject. Among the contents are: 1. Cordage, Kinds of Rope. Construction of Rope, Parts of Rope Cable and Bolt Rope. Strength of Rope, Weight of Rope. 2. Simple Knots and Bends. Terms Used in Handling Rope. Seizing Rope. 3. Ties and Hitches. 4. Noose, Loops and Mooring Knots. 5. Shortenings, Grommets and Salvages. 6. Lashings, Seizings and Splices. 7. Fancy Knots and Rope Work. 128 pages.
150 original engravings. Price