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INTERESTED IN MECHANICS?
Our monthly journal, MODERN MACHINERY, keeps you informed on progress in the mechanical field. Nicely illustrated, interestingly written. Valuable alike to shop man or plant owner. We give here the table of contents of the July, 1904, number. HACHINERY EXHIBIT AT ST. LOUIS.-A RATIONAL BASIS FOR WAGES.-CHAS.C. CHRISTENSEN, M.E.-THE HERSTAL NATIONAL ARMORY.-MOLDING MACHINES. THE ULTIMETER.-A. TRAVELING MACHINE SHOP. -FORMING TWIST DRILLS.-PHOTO TAKEN BY RADIUM.-GERMAN HIGH-SPEED LOCOMOTIVE.- IRON AND STEE PROSPECTS IN FRANCE.-MACHINE FOR SPLITTING WOOD.-NEW FLOATING DOCK IN GERMANY.COST OF STEAM VS. HORSE POWER.-REFRIGERATING MACH'Y IN BATTLESHIPS.-POWERFUL TOYS OF WEALTHY AMERICANS.-WASTED MACHINERY ON PANAMA CANAL.-ELECTRIC POWER ERA IN SCOTLAND. -PNEUMATIC MAIL TUBE TESTS IN CHICAGO.-THE PAY CHECK SYSTEM.-STORY TOLD AT WORLD'S PAIR.-NEW MACHINERY OF THE MONTH.-HINTS IN MECHANICAL ENGINEERING.-QUESTIONS AND ANSWERS.
With every sub
scription we send free any one of the three Premiums mentioned below. Subscribe now, $1.00 per year. No back numbers furnished The Handiest Thing in the World is
If You Have Not Got a "Desk
Watch" You Ought To Get One They will keep just as good time as an expensive watch: can be placed anywhere on your desk, or may be carried in your pocket. Once you find how convenient a desk watch is you will wonder how you ever got along without one. The watch is regular pocket size, full nickeled case, keeps accurate time and runs thirty hours with one winding.
Did You Ever Feel the Need of a Stylo?
GRAVITYSO STYLO !
A Stylo is a Pencil that writes with Ink-It is not a Pen. There is not a inan in the world who uses a lead pencil but has wished that it were possible to have a satisfactory pencil that used ink instead of lead. Well, here it is It is not
MERS the oldfashioned stylo with a stiff needle or spring needle: it has just been patented and placed on the market. It is called the Gravity Stylo, and its name signifies the principle on which it works. It is only another instance of going back to Nature's laws to
find success. One great advantage about these Stylos is that when left lying on the
How Far Do You Walk
in a Day?
Did it ever occur to you that perhaps you walked miles
Modern you'd like to know. If so, get a Pedometer. A
Machinery, Pedometer is an ingenious affair that goes when
Security Bldg. you go and stops when you stop. You put
Chicago it in your pocket like a watch (it's smaller
GENTI EMEX:than a watch, too), and when you want to
Enclosed find know how far you have walked, all you
81.00 for which please have to do is to look at the Pedometer.
send Modern MachinThese instruments have hereto
ery for one year, and fore been very expensive, costing
in accordance with your
offer, please send me. free from ten to fifteen dollars,
of charge, One Desk Watch. but this one has just been
One Stylo. One Pedometer. placed on the market. It is
(Kindly encercle one desired). not a toy, but an accurate
CUT OUT AND MAIL TO-DAY
Mention The Technical World.
= 32 Volumes
GRADUATE AND STUDENT NOTES-(Continued)
Hendrick, F. C., Chicago, Ill.—Course: Electrical.
Huck, John, Independence, La.—Course: Complete Mathematical.
Jessop, Edward, York, Pa.—Course: Mechanical.
Hetzler, G. E., Dayton, 0.—Course: Electrical.
Kellar, John G., Albany, N. Y.-Course:
Kylberg, Sylvester C., Wyoming, Milburn
Langsdale, B. W., Kansas City, Mo.
Course: Mechanical Drawing. And $1.00 a Month for 15 Months Lindholm, John I., Bridgeport, Conn.or Cash with the Order, $12.50 Course: Mechanical-Electrical.
Montgomery, E. G., Topeka, Kan.—Course : Heating, Ventilating, and Plumbing.
Osborn, Rex Elmer, Toledo, 0.–Course : W E HAVE decided to add a thousand new Mechanical-Electrical. customers to our list in the next few weeks
Petritsch, Jos., Chicago, Ill.—Course: Shop no matter what the cost. The plan we
Practice. adopted in order to do this is in making some Powers, Wm., Montreal, Que.-Course: (never-before-thought-of) offers to TECHNICAL Electrical. World readers. We were exceedingly fortu
Richardson, F. M. M., Nashville, Tenn.nate in securing a few sets of “The Scientific
Course: Mechanical-Electrical. Library" in a "remainder lot sale" which we
Wallace, John have just received. They are bound in Buckram
D., Chicago, Ill.—Course :
Mechanical Engineering. and have been selling regularly at $48.00 per set.
Winehold, Wm., Wadena, Ind.--Course: Volumes:
Zito, James, Ft. Casey, Wash.—Course :
MR. MANGER, of Dawson City, Yukon
Territory, writes that there is a regular Tyndall's Sound, 1 vol.
stampede to the new Tanana placer digKelvin & Tait's Elements of Natural Philo., 1 vol. Spencer's Data of Ethics, 1 vol.
gings, that many of his friends are leavSpencer's First Principles, 1 vol. Kant's Critique of Pure Reason, 1 vol.
ing for the newly discovered goldfields. Hegel's Philosophy and History, 1 vol. Tunzleman's Electricity in Modern Life, 1 vol. Atkin's Elementary Text Book of Botany. 1 vol. Proctor's Other Worlds tban Ours, 1 vol.
Gosse's The Microscope, 1 vol. cloth. At LESS than ONE-THIRD the regular Mr. R. W. COLLINS, of Monterey, Cal., price. Sent by Freight, not Prepaid writes: “I was at Salmos for a year, re
building a badly run down plant, but These books should be in every house. The supply is limited. By filling out the cou
May ist was transferred to the plant at pon attached and forwarding to us, we
this place, where I have been made Suwill send the books to you for in
perintendent of the Company's work here spection. If satisfactory, send
and Chief Electrician of the other plants us 50c within 5 days, and
The then $1 a month for 15
-the Salmos plant having been taken
Pilgrim months, or $12.50 cash.
over by the above Company. Write now to the
Press, Chicago Pilgrim Press 69 Send on approval as
advertised in September 175 Wabash Ave. 70
TECHNICAL WORLD, 3 v. set CHICAGO
Scientific Library. If satisfactory will pay 50c cash and $1 a month for
MR. C. W. DOUGLAS, of St. Louis, Mo., 15 months. If not will return set an American School student, is attending within five days.
the summer school of the Armour InstiName......
tute of Technology, and taking the Address...............
courses in Mechanics and Electricity. Mention The Technical IVorld.
CYCLOPEDIA OF APPLIED ELECTRICITY AREAL STORES LA
A PRACTICAL GUIDE for MECHANICS, ELECTRICIANS,
VIVE Volumes—2,500 Pages-size of pages, 8x10 inches. Handsomely and durably bound in buckram, profusely
illustrated with over 2,000 full-page plates, diagrams, plans, sections, tables, formulæ, etc. Invaluable alike to the expert electrician and the apprentice. Thousands of dollars and years of preparation have been required to compile the material for this work. Every section written by an acknowledged authority. Prepared es
pecially for practical, everyday use. Combines the best features of a textbook and a reference work, as every volume is supplemented with a carefully prepared list of test questions to impress the important points upon the reader's mind. A ready reference work for the experienced workman, as it is free from abstract theory and difficult mathematics
Half Price Special Advance Offer.
Some of the Writers.
$ 2.50 PAID NOW secures this $25.00 Cyclopedia for just half price-$12.50-delivered, express prepaid.
- The regular price of the Cyclopedia of Applied Electricity is $25.00. We are printing an edition for our own use. To secure immediately a sufficient number of orders to warrant our increasing the edition, and thus reduce the cost of manufacture to us, we will distribute 1,000 extra sets at the reduced cost of manufacture while they last. We do this to introduce the work, knowing that it will greatly increase the regular sale. This offer is made for immediate acceptance. Reservations must be made now.
The full set of five volumes will be delivered to you as soon as it is off the press. Cut out the coupon below and mail to us. No further payment need be made until November 1st, when payment of balance at the rate of 22.00 per month must begin. Order immediately to insure yourself this valuable reference work at half price.
ORDER NOW-Order will be entered as received, and positively no sets will be sold at half price after the edition now at press has been subscribed. If you are not in time for a set your $2.50 will be returned to you.
Partial Table of Contents. PROF. F. B. CROCKER, head of Department of Elec Part 1.-Static and Dynamic Electricity-Primary Batter
trical Engineering, Columbia University: author of ies-Ohm's Law-Wire Calculations - Electrical Measthe sections on Storage Batteries and Management urements-Wiring for Light and Power-Electric Teleof Dynamo Electric Machinery.
gragh, including the Duplex and Quadruplex. PROF. WILLIAM ESTY, head of the Department of Part II.-Theory of Dynamo-Electric Machinery-Design
Electrical Engineering. Lehigh University: author of and Construction of Dynamos and Motors-Types of the section on Alternating Current Machinery.
Machines - Storage Batteries, including Theory, ManH. C. CUSHING, Jr., Wiring Expert and Consulting
agement and Types. Engineer: author of the section on Wiring for Light Part III.-Incandescent and Arc Lighting-Electric Railand Power
ways, including Car Wiring. Line Construction. ThirdPROF. DUGALD C. JACKSON, Collaborator with
Rail and Multiple-Unit Systems-Management of DynaPROF. GEORGE C. SHAAD, University of Wiscon
mo-Electric Machinery-Power Station Work, including
Boilers, Engines and Electrical Machinery-High Tensin: author of sections on Power Transmission, Electric Lighting and Central Stations,
sion Transmission. J. R. CRAVATH, Western Editor of the Street Railway
Part IV.-Theory of Alternating Currents-Construction,
Types and Operation of Alternators, Transformers, InJournal: author of the section on Street Railways.
duction Motors, Synchronous Motors and Rotary Con. Mass. Institute of Technology:
verters. WILLIAM BOYRER, Telephone Expert and Consult
| Part V.-The Telephone - Instruments - Line Construcing Engineer: CHAS. THOM, Chief of Quadruplex
tion-Switchboards - ExchangesDepartment Western Union Telegraph Co.: author of
Operation and Maintenance-Comsection on Telegraphy, and others.
mon Battery System. - COUPON-Cut out and mail toAMERICAN SCHOOL OF CORRESPONDENCE
at Armour Institute of Technology. Enclosed find $2.50 for first payment on half-price sale of Cyclopedia of Applied Electricity. The balance ($10) I will pay in monthly payments of $2.00 each, beginning November 1.
It is understood that I may return the set at your expense within five days, and that you will refund the amount paid if the set is not wholly satisfactory to me. Also that you will return the $2.50 if my order is received too late for the half-price sale. (Tech. World.)
AMERICAN SCHOOL of CORRESPONDENCE At ARMOUR INSTITUTE OF TECHNOLOGY, CHICAGO
Mention The Technical World.
FOR YOUR DESK
GRADUATE AND STUDENT NOTES - (Continued
TAZEWELL GILMER, Brooklyn, N. Y., has successfully passed the Civil Service Examination.
Elbert Hubbard, The
Roycrofters," E Aurora, N. Y.: "I think that your cabi. net has added several years to my earth life by enabling me to find the thing without wear or tear on my temper and vocabulary."
JOHN J. WHEELER, a graduate of the Armour Institute, Class of '97, in Mechanical Engineering, and at present enrolled in the American School in the Electrical Department, is Instructor at the Tuskegee (Ala.) Institute in Mechanical Engineering.
Geo. H. Daniels, Gen'l
Pass's Agent, N. Y.
pensable to me in my
Even a gifted writer like Elbert Hubbard can. not adequately describe the value of this cabinet to the man with a desk. It forms a complete, durable, ever-ready receptacle for all the clippings, manu. scripts, illustrations you wish to preserve the cleverest classifier of miscellaneous papers ever invented. It is a veritable savings bank of information-worth 47 scrap books.
All complete, it consists of a substantial air tight, dust-proof box fitted with a full supply of specially made holders, each of which not only shows the contents in it, but by the ingenious indexing system shows just where everything else referring to its contents may be found. It sits conveniently on your desk and takes care absolutely of all the papers and data that you inight otherwise lose or forget-perliaps throw in the waste basket for want of a better place to put it. The cabinet is a genuine Library Filing Cabinet never before made in desk size, and has sold for $15.00 to $500.oo in large sizes. The Desk Cabinet we offer you free is equal in every respect to the expensive kind except the size. The free offer is in connection with
Edited by A. W. SHAW
cess. And, so is SYSTEM, the
SYSTEM will solve your business per.
plexities-but if it does not, SYSTEM
Designed and Constructed by Hubbell & Benes, Architects. from your magazine have
enabled me to formulate systems for Mr. Patterson's letters, books, pamphlets, orders, etc., which have simplified the work greatly."
An Error Corrected “I have learned more from SYSTEM in five months than in ten years of hard study and knocks in business. It is worth ten times the charges for it. F. A. PHILBRICK, Baraboo, Wisconsin.
THROUGH a misrepresentation of Special Offer
facts, the Editors of THE TECHNICAL We said the desk cabinet would cost you nothing. Here is the way. Send
WORLD were led—or rather misled-into us two dollars for a year's subscription to SYSTEM and we will send you, every
making an erroneous statement in the cost prepaid, a cabinet with your name in gold on top. Write your name and ad.
August number regarding the designing
and construction of the Citizens Building, out this advertisement and mail it to us. Write plainly, so that we will make no
Cleveland, O., ascribing the credit theremistake in setting your name. Inclose the money and we will enter you as a
for to the wrong party. The architects subscriber-send you an expert consulta.
of this structure were Messrs. Hubbell & tion certificate entitling you to free advice -and ship you the cabinet. Act at once.
Benes, who have their offices in the buildWe have only a few of the cabinets on hand and we believe they will be snapped
ing; and THE TECIINICAL WORLD gladly up in a hurry. ACT. ÍHE SYSTEM COMPANY
takes this opportunity to correct the 992 First National Bank Building. Chicago error.
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