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Locations for Industries

Erie Railroad Chicago to New York

The Erie Railroad Company's Industrial Department has all the territory traversed by the railroad districted in relation to resources, adaptability, markets and advantages for manufacturing, and can advise with manufacturers in relation to the most suitable locations. For full information, address

LUIS JACKSON

Industrial Commissioner
Erie Railroad Company

21 Cortlandt Street, New York

LITERATURE-(Continued)

practical work, but even a slight examination indicates the strong tendency toward the practical. The names of the authors alone are sufficient to guarantee the practical usefulness of the volume. Prof. E. Spangenberg, C. E., was superintendent of the St. Louis School of Engineering, a man of wide practical experience and a successful teacher, especially in the preparation of men for license examinations. Mr. Albert Uhl, A. I. E. E., is an electrical contractor, and is instructor in practical electricity at the St. Louis School of Engineering. The third author, Mr. E. W. Pratt, is an expert on locomotive and railroad matters, being Master Mechanic of one of the large railways.

Telephone Principles and Practice. By George Wilder, Ph. D., Assistant Professor of Electrical Engineering, Armour Institute of Technology. Pages 445. Cantwell Publishing Company, Madison, Wis. Price, $2.00, postpaid.

THIS is a new book in the telephone field, and consequently has the prime advantage of being thoroughly up-to-date. The aim of the book is to treat fully the fundamental principles of telephony, and their applications to telephone apparatus as designed, manufactured, and operated to-day. This the author has succeeded in doing admirably, in a clear and concise manner.

The subject is treated in four sections. The first covers the principles of physics and electricity, which are necessary for the reader to grasp in order to be able to apply them to the construction and operation of the telephone circuits. The second section relates to the details of subscribers' instruments. The third section treats of party lines, and of the management of small exchanges belonging to the Generator Call or Local Battery type. The fourth section deals with the construction of small exchanges, party and toll lines, their electrical properties, and their protection against lightning.

The book is profusely illustrated, a particularly valuable feature being circuits of the various phones in actual use to-day.

Mention The Technical World.

the

$33 Pacific

Coast

From Chicago, every day, September 15 to October
15, 1904, via the

Chicago, Milwaukee & St. Paul Ry.

To California you have the advantage of the over-
land service of the Chicago, Milwaukee & St. Paul and
Union Pacific Line. Through train service, including
Standard and tourist sleeping cars, Chicago to San Fran-
cisco every day. Tourist cars to Los Angeles Mondays
and Saturdays. Leave Chicago 10:25 P. M.

To North Pacific Coast points you have the choice
of the above route or that via St. Paul and Minneapolis,
with double daily train service.
Leave Chicago 9 A. M.,

6:30 P. M. and 10:30 P. M.

For those who prefer a Southern route to California, the Southwest Limited via Kansas City is recommended. Leave Chicago 6 P. M. daily.

Tickets

Above rates are called colonist second-class rates.
are good in tourist sleepers, in which the rate for a double berth,
Chicago to San Francisco, or Los Angeles is $7. Tourist
sleepers are clean, comfortable and economical.

A postal card will bring you complete information.

F. A. MILLER,

General Passenger Agent,
CHICAGO.

Chicago, Milwaukee & St. Paul Railway.

LITERATURE-(Continued)

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We are making this offer in connection with SYSTEM, the magazine which is as essential to business men as system itself is to business. SYSTEM tells every month all the new

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The subscription price of SYSTEM is $2.00 per year. The Sherwin Cody books, described above, sell for $3.00. To subscribers of SYSTEM, however, we will send the books at less than half the regular cost. Send $2.00 for SYSTEM and 81.00 for the books, and we will enter your name for one year of SYSTEM (including the free expert service), and will express you the books in a case at once, every cost prepaid. Send the $3.00 to-day. Tear out this advertisement and

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The Armour Glue Works, Chicago, Ill.

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CHICAGO

Magazines

Cassier's Magazine (August)-New York

THIS NUMBER contains as one of its most interesting features an article on Marble Quarrying in America, by D. A. Willey. Probably very few people know of the vast resources of the Vermont marble quarries, yet one enterprise alone produces from 60,000 to 70,000 tons annually. And from other deposits in this vicinity more marble is quarried than from all the other American quarries combined. This is interesting from a scientific standpoint, because practically all the work, from the quarrying of the marble to the finishing of the complete object, is done electrically and from power furnished by the Otter Creek. This same industry now gives employment to some 5,000 men and represents an investment of $7,500,000. Not only is the marble furnished for rough and cheap grades of work, but the finished product ranges from the block for the building base to statues and vases, as well as interior decoration.

The mechanism for working in marble is so varied that a piece of the stone can be turned, planed, and routed as well as a piece of steel, entirely by power tools. The tool of the turning lathe is applied as in the ordinary metal turning lathe. Here can be seen circular columns weighing over 20 tons, exactly shaped by the power lathes. Also globes and tombstones containing ornaments in a basrelief done with a planer. These machines are operated both by water power and by individual electric motors. The pneumatic chisel is an aid to the sculptor, who can create designs not only beautiful but extremely intricate in a small fraction of the time required with the mallet. "Industrial Locomotives," by J. F. Gairns, treats the subject from the standpoint of compressed air and internal combustion. The writer states that it is probable that the compressed air locomotive would have been largely made use of if electricity had not provided a remedy for the disadvantages and inconvenience of the steam locomotive.

"The Study of Science," by John Brisben Walker, shows conclusively how ab

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Mention The Technical World.

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Municipal Engineering (August) - Indianapolis and New York

THE FIRST ARTICLE is on "Concrete-Steel Bridges at Dayton, Ohio." The concrete construction is becoming such an important factor in the building trades at the present time, that these articles are always read with great interest.

Another interesting article is on "Paving Materials," by John W. Alvord, C. E. In this article the writer gives an excellent description of the most common kinds of pavement, such as asphalt, stone pavement, brick, wood, macadam, and bitulithic.

The usual interesting departmentsQuestion Department, Notes on Water Supply, Cement and Concrete, Streets and Lighting, Sewerage, etc.-are excellent.

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Amateur Work (August)-Boston, Mass.

THE LEADING ARTICLES for this month's number of Amateur Work are along electrical lines, the first being "The Telegraph Transmitter," by Frederick A. Draper, which takes up a simple arrangement for transmitting messages.

The second article, on "Wireless Telegraph Apparatus," by Howard W. Rice, gives a few personal observations upon the interesting devices employed in space telegraphy.

"Telephone Circuits and Wiring," by Arthur H. Bell, is the third article along this line. A very interesting item is that

Mention The Technical World.

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