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bination of wide experience in the class
room and unquestionable scholarship.

in the rough or partly fin-
ished, for the half

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en Franklin

Gas Engine

Castings, Materials and Blue Prints, complete, $16.50.
Horizontal and Upright Types. Send for

Circular 7. PARSELL @ WEED 129-131 West 31st St.


Electrical Engineers & Contractors
Manufacturers of Switch Boards and Panel Boards

Telephone Main 3663
88-90 La Salle Street, Chicago

Boiler Construction. By Frank B. Kleinhans. Pages

421. Cloth. Illustrated. The Derry-Collard Company,

New York, Publishers. Price, $3.00.
THE FIRST IMPRESSION one gets from this
book is that it is devoted largely to the
locomotive type; but the reason is readily
understood when one considers that the
operations on other boilers are much
more simple, while the methods and ma-
chinery are the same.

A valuable feature is the clear explana-
tion of the way things are done and the
tools used in doing them. The illustra-
tions are very clear and readily under-
stood. The following are some of the
processes that deserve mention here:
Laying Out Gusset Sheet, Dome Base,
Tube Sheets, Throat Sheets; Flanging;
Punching ; Planing; Bending; etc.

Boiler-Shop Machinery is illustrated by excellent half-tone engravings. Tables give valuable information regarding dies and punches, rate of driving rivets, etc.

Takes spare time only. Oldest and Best
Correspondence School in the World.
Same teachers for ten years. Plan ap.
proved by Judges and Educators. Adapt-
ed to the busy boy or man. Prepares for
the bar. Three courses: College, Busi-
ness, Preparatory, Opens new prospects
in businessGraduates everywhere.
Liboral terms. Special offor now.
Postal card now will bring full par.

ticulars. SPRAGUE
Corrospondonco School of Law
369 Majestic Bldg., Detroit, Mich.

- -




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Steel Square Pocket-Book. By Dwight L. Stoddard.

Pages 110. Cloth. Illustrated. Industrial Publication

Company, New York, Publishers. Price, 50 cents. THIS LITTLE INEXPENSIVE BOOK gives the practical, every-day uses of the steel square. The various graduations are first explained so that the reader may know the tool. Laying-out spacing, and measuring main rafters, valley and hip rafters, jack rafters, miters, curved rafters, etc., are among the subjects treated. The illustrations are very clear and simple. A thorough understanding of the problems in the book should lead to a complete mastery of the tool.

The most costly piece of railroad literature ever is-
sued is the special Southern edition of the SEABOARD Steam and Electrical Engineering in Questions
MAGAZINE OF OPPORTUNITIES, - yes, there is one for you.

and Answers. By Spangenberg, Uhl, and Pratt.
It is unique, contains no advertisements, but hundreds
of full page and half page photo-gravures-the most ex-

Cloth. Illustrated. Indexed. Pages 672. Geo. A. quisite examples of the modern printers' art, and each

Zeller, St. Louis, Mo., Publisher. Price, $3.50. worthy of framing. Sent free on receipt of 10 cents to

THIS REFERENCE BOOK for steam, elecpay postage.

trical, and refrigerating engineers, is preJ. W. WHITE,

pared in question-and-answer form, and

includes stationary, locomotive, and elec-
General Industrial Agent,

trical subjects, as well as mechanical re

frigeration, compressed air, gas engines, SEABOARD AIR LINE RAILWAY hydraulic elevators, etc. The book en

deavors to combine both theoretical and Mention The Technical World.

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Mention The Technical World.

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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.



For full information and descriptive pamphlet, address


Industrial Commissionos, 1 Park Row, Chicago, ill.

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.


for Industries Erie Railroad Chicago to New York

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 Erie Railroad Company's the reader to grasp in order to be able Industrial Department has all to apply them to the construction and the territory traversed by the

operation of the telephone circuits. The

second section relates to the details of railroad districted in relation to

subscribers instruments. The third secresources, adaptability, markets tion treats of party lines, and of the manand advantages for manufactur

agement of small exchanges belonging ing, and can advise with manu

to the Generator Call or Local Battery facturers in relation to the most

type. The fourth section deals with the suitable locations. For full in

construction of small exchanges, party

and toll lines, their electrical properties, formation, address

and their protection against lightning. LUIS JACKSON

The book is profusely illustrated, a Industrial Commissioner

particularly valuable feature being cirErie Railroad Company

cuits of the various phones in actual use 21 Cortlandt Street, New York

to-day. Mention The Technical World.

SOOD To the

2 Pacific

ee Coast



From Chicago, every day, September 15 to October

15, 1904, via the Chicago, Milwaukee 2 St. Paul Ry.

To California you have the advantage of the overland service of the Chicago, Milwaukee & St. Paul and Union Pacific Line. Through train service, including Standard and tourist sleeping cars, Chicago to San Francisco 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.

Above rates are called colonist second-class rates. Tickets 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.

General Passenger Agent,


Chicago, Milwaukee 2 St. Paul Railway.

Mention The Technical World.

Good Business English



















These books teach salesmen how to write convincing letters that sell goods, teach credit men how to write tactful letters that bring in money and give no offense, teach correspondents how to write forceful business-bringing letters, teach stenographers how to master correspondence, teach advertisement writers how to write strong, "pulling' copy. They form a complete college course in business English to be read at leisure-to be put into daily practice at once. Many successful men are earning large salaries merely because they know how to state a business proposition clearly, tersely, concisely, forcefully. This set of books comprises the notable Sherwin Cody course in business English complete. Before being published in book form

solaiorberg 0 Den
this course sold for $95.00. Every business man, employer
and employee should have this set ready for reference.


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

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cramtul of business ideas for
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The subscription price of
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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 Less Than Regular Price 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 SYSTEM

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 WRITE YOUR NAME BELOW

pneumatic chisel is an aid to the sculptor, The Armour Glue Works, Chicago, Ill.

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 cided financial advantage.”

probable that the compressed air locoAdvertising Expert.

motive would have been largely made use of if electricity had not provided a

remedy for the disadvantages and inconSend with Three Dollars at our risk to THE SYSTEM COMPANY

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"The Study of Science," by John Bris

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Company, Leetonia, Ohio. "A single article is frequently worth much more than the price of a year's subscription.” C. E. GREENAMYER.

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