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Other articles are:

Transporter Bridges, by Benj. H. Ridgely, M. T. Hugues. Thornwall Haynes.

Changes in Machine Tool Design, by C. H. Benjamin.

The Most Powerful Locomotive in the World, by Geo. W. Martin.

Variable Speed Appliances, by E. K. Hood.

Industrial Locomotives, Part III, by J. F. Gairns.

Drop-Valve Engines, by Charles Hurst.

American Electrician (September)—New York One Of Tiik Most Interesting Articles in this issue is upon the repulsion motor, in which the author treats this piece of apparatus as a transformer with secondary coil movable with respect to the primary. The author has attempted to treat the subject in a manner simple enough to be easily comprehended without the use of the complex mathematical symbols which are so often confusing to the average reader.

Under the heading "A Progressive Western Telephone Exchange," II. K. Sprague discusses the new telephone exchange at Boulder, Col., recently completed by the Colorado Telephone Company. The company has outgrown its former quarters, and, at the same time that it is moving into its new building, is remodeling its equipment from the old-style magneto system to the common battery central energy.

An interesting discussion of the Electric Power Field by (ieorge E. Walsh shows many reasons why the use of electricity for power is becoming more and more popular. Often manufacturing concerns and mills, owing to the difficulty of obtaining fuel, have been obliged to move away from towns and cities where they were suitably located as far as markets and supply of raw material were concerned. With electricity supplied from large central stations, however, at wholesale rates, this difficulty is obviated.

Other articles are:

Feeding Steam Boilers.

Traffic Design of Central Office Switchboards.

Automatic Block Signals.

How to Make a High-Voltage Testing Battery.

Boiler-Room Management.

Mention The Technical World.


This volume weighs five pounds and is held by one leaf. So much for the quality of binding and paper.

This new edition of

Battles and Leaders of the Civil War


It has been prepared especially to meet the demand of an increasing population and a new generation. This work, in four volumes, 3098 pages, is the greatest exposition of the world's greatest war ever printed. It rivals the War Records themselves in completeness, authenticity and detail, and is vastly more interesting. Generals Grant, Sherman, Johnston, Beauregard, Col. Mosby, Capt. Ericsson, and hundreds of

tj others, men from both sides, are its editors, t making it accurate and impartial; its illustra

tions,—over 1700,—maps, and diagrams give a panoramic view of this awful struggle; and its index, referring to every important person and event, with statistical tables of the opposing forces in every engagement, makes it a veritable

Cyclopedia of the Civil War.

What history is so complete? What history can be so complete?

If you want a reliable source of information or a complete reference library, or love American history, you cannot afford to be without this work, especially at the reduced price and under the new plan of payment.

Napoleon Bonaparte:

Ji History. Complete in Four Volumes

Editorially, mechanically, and artistically this work is a wonder. It is the only complete, impartial account of the great Emperor's life. All others have tended toward hero worship or erred to an equal extent on the other side. Professor Sloane was thoroughly equipped for this work through exhaustive study of all the Napoleonic literature obtainable and by extensive travel over the scenes of Napoleon's struggles, affluence, and subsequent downfall.

Eighty-seven artists have contributed to its pages, including the most famous military painters of France. About one-third of the three hundred pictures are reproduced in the original colors by a special process far superior to lithography. It is a veritable art gallery giving a pictorial history of the Napoleonic wars.

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LITERATURE l Continued I

Power (September)—New York

Of The More Important Articles, "Gas Producers for Power," by Julius I. Wile, is perhaps the most interesting, especially to one engaged in the generation of power. In this article the chemical end receives due attention. The article describes both the suction and the pressure types and is well illustrated.

"Valves and Valve Gears," by Robert G. Griswold, explains in simple style and excellent diagrams, the action of the plain slide valve.

"Splicing Leather Belts," by W. E. Dixon, M. E., is another valuable contribution on this topic. The methods of using the scraper, opener, and splicing board, are well illustrated.

Among other articles may be mentioned:

The Power House of the Interborough Rapid Transit Company.

Curves of Performance, by W. H. Booth.

Expansion Joints for Smoke Flues, by C. E. Flanigan.

Lubricating Oils, by W. M. Davis.

European Practice in the Use of Superheated Steam, by Franz Koester.


International Steam Pump Company, New York. Pumping Machinery. Pages 16. Paper, i'i by 12 inches.

A Handsome Catalogue in which are described and illustrated with excellent half-tones forty types of pumping machinery comprised in the exhibit of this company at the St. Louis Exposition, including not only pumps proper, but also air-compressing and steam-condensing apparatus, cooling towers, vacuum machines, water meters, etc. The processes in which these machines are employed on the Exposition grounds, such as timber preserving and refrigeration, are fully explained, and diagrams and graphical charts are employed to illustrate the design and arrangement of apparatus. A striking view of the Grand Cascade is shown on the cover, and the immense Worthington turbine pumps by which the water is supplied are described. Sent free on application.

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C The Rambler engine—horizontal type, large bore, long stroke—provides more power, in less space, at less cost to produce, than any other engine of any other make.

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American Vulcanized Fibre Company, Wilmington, Delaware. Pages 40. Paper, 5 by 7 1-2 inches.

Catalogue describing the uses of vulcanized fibre, a material of great strength, elasticity, and durability, which is applicable in some form to almost every branch of electrical or mechanical industry. Illustrations, price list, and tables may also be found in this catalogue.

The 0. C. White Company, Worcester, Mass. Pages 68. Paper, 9 by 6 inches.

Catalogue of adjustable fixtures for incandescent lamps, with illustrations and price list. The method of illumination— whereby the light is brought to bear from just the point desired relative to the object, instead of the object having to be placed relative to the light—has made these adjustable fixtures very popular.

Welsbach Company, Gloucester City, New Jersey. Pages 40. Paper, 9 by 12 inches.

This Catalogue is resplendent with fine illustrations of mantles, imported and domestic fancy globes, lights of various styles of glassware, on the improved universal Welsbach burner, gas globes, burners, double cone reflectors, Japanese portables, which are the Welsbach Company's exclusive importations, etc. Attention is called to the by-pass cock, and its working explained.

B. F. Sturtevant Company, Boston, Mass. Pages 16. Paper, 6 1-2 by 9 inches.

An Illustrated Catalogue of the Sturtevant disc and propeller fans, giving in detail descriptions of their application and construction; also tables of speed.

R. K. Leblond Machine Tool Company, Cincinnati, Ohio. The Modern Milling Machine. Pages 56. Paper, 4 by 6 inches.

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