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culated through the pipes. By this means the air is cooled before being forced around the openings. The pipes for heating and ventilation are concealed as much as possible. The openings supplying heat are placed near the deck; and those for ventilating are near the ceiling.

The ventilation is both natural and mechanical. One particular feature in the heating and ventilation, is that no stateroom is supplied with heat directly. The lower portions of the doors are made of slat work, similar to blinds, but stationary. As every room has an opening for ventilation, the exhaust fans are drawing the air out of the rooms, and, to supply the deficiency in these rooms, the warm air from outside flows in through the slat work in the doors and results in a continual movement, or circulation, keeping the rooms comfortably heated.

be too happy to impart any information to those of our graduates, students, and readers who contemplate a visit to this beautiful "Island of Springs."

There are several points of interest which will delight the visitor, during his tour. He probably lands in Kingston (the capital), where he can be accommodated at Myrtle-Bank or Constant Spring Hotel. He is then at liberty to have a pleasant ride in an electric car, in any section of the town, for twopence.

He will naturally be anxious to visit the country, which he can do by rail, cutting obliquely across the island from Kingston to Montego Bay, a distance of 114 miles. The scenery is extremely wild, especially that viewed while running through the Cockpit mountains.

It is necessary to take a buggy from Montego Bay, in order to visit the north

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LEARN THE VIOLIN

It is a sure source of revenue, as well as a most desirable accomplishment.

The violin is not played nearly as much as it should be in this country. There is always a demand for violin players, Free and in order to contrib

Instruction ute toward the increased

use of the violin we are

giving free instructions for a short time.

A performer upon the violin of even ordinary ability has at command a ready Make Money source of income-$3.00 to $5.00 an evening is easily obtained Easy without interference with one's regular daily occupation, and in the largest cities thousands of persons, both men and women, make their livelihood with the violin, and make splendid incomes.

We have been nearly a year arranging a plan of instruction by which each student Free Instruction can have the benefit of instruction from experienced and competent teachers. To every purchaser of one of our Student's Violin Outfits we furnish a full course of instruction free.

By Mail

It is not difficult; certainly anyone who has a conception of time and pitch can Almost Anyone learn with application and ordinary intelligence. The violin is Can Learn the least mechanical of musical instruments, and it can be learned by the student with less personal instruction. With our illustrated course of lessons, finger-board chart and hundred-page book containing simple, clear and concise instructions, beautiful exercises and tunes, we are enabled to teach and interest the student in a way never before possible. Personal letters of instruction from our teachers is part of the course, and the entire course is free.

Complete Student's Outfit, $12.50

Consists of the following, with all express charges prepaid:

Root Orchestra Violin,
Violin Bow, Violin Case,
Extra Set Root Special Strings,

Box of Rosin,

Tuning Pipe,
Finger Board Chart,

Extra Bridge,

100-Page Instruction Book, Full Course Letter Instruction.

Total retail value of above is $23.75. We offer one thousand outfits at only $12.50 each. THE VIOLIN-The Root Orchestra Violin, specially made for us in Germany, is a scientifically constructed instrument, its model an exact copy of the Stradivarius, the greatest of all violins. The neck, back and sides are handsome curly maple, well seasoned; the top is made of very old, close-grain spruce, carefully selected for its resonance. The violin is lined and blocked throughout; has perfect fitting bass bar and sound post; pegs, fingerboard and tail piece, etc., are of best ebony. Fine varnish and the natural wood beautifully shaded make this violin very handsome. The tone is smooth and sweet, with good power and carrying quality, Before leaving our hands it is newly strung, carefully adjusted and put in perfect playing order by an expert and artist. Thousands of these violins, bearing the old reliable, honorable and widely known name of Root & Sons, are in use all over the country. Our house has been established almost fifty years, and our name on these violins is a safe guarantee of their excellence and value. THE BOW-Very fine quality of Brazil wood; full German silver lined and trimmed and well filled with our finest French hair.

THE CASE-Black wood violin case, well made and finished with hooks and lock and key.

If you prefer to do so you may send $1.00 and we will ship the Student's Outfit C. O. D. for the balance, which you may pay the express agent. If not fully up to our claims return to us at our expense.

If you wish further particulars before ordering, write us. We refer you to any bank or express company in Chicago as to our standing and reliability.

COUPON. Cut out and mail to us.

T.W.

E. T. ROOT & SONS, 353 to 361 Wabash Ave., Chicago:
Please send me by express your Complete
Student's Violin Outfit, for which I enclose
$12.50. After I receive outfit if it is not satis-
factory you are to return the $12.50.
Name...

......

Street Address..

City...

State...

Illustrated Catalogue of Violins, Mandolins, Guitars and Musical Merchandise of all kinds and at
very low prices. Sent Free on request. Violins from $3.50 upwards.

E. T. ROOT & SONS, Chicago

Musical Instruments

Established 1857

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HOME
MAKING

Practical Lessons by Mail in

Chemistry of the Household

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The House; Its Plan, Decor. ation, and Care

Personal Hygiene
Home Care of the Siek
Study of Child Life
Care of Children

Textiles and Clothing

The Instruction is under the direction of prominent teachers in Columbia University, University of Chicago, University of Illinois, Simmons College, Lewis Institute, etc.

Sample Lesson Booklet

If you will send us the names of three friends whom you know to be interested and two 2-cent stamps for postage, we will mail you the first lesson on "Chemistry of the Household," an illustrated 64-page booklet, especially prepared for our students by Margaret E. Dodd, S. B.,Grad. Mass. Inst. Technology, containing interesting non-technical treatise on Chemistry of Water, Air, Fire and Fuel; Chemical Composition and Changes; Food and its Functions; Starches and Sugars; Chemistry of Bread Making; Composition and Use as Food-of Carbohydrates, Fats, Proteids, Casein, Gluten, etc., Chemistry of Digestion, Chemistry of Cooking, etc., etc.

We will also send our 48-page iliustrated Catalogue A giving full synopses of all subjects. American School of Household Economics 3309 Armour Avenue : ::: CHICAGO, ILL.

Recently Graduated

THE FOLLOWING STUDENTS have been graduated from the American School of Correspondence since the last number of THE TECHNICAL WORLD was issued:

Adams, G. C., Winthrop, Me.-Course: Electrical.

Beerbower, Clyde, Salem, Va.-Course: Electrical.

Clifford, James A., Billings, Mont.-Course: Electrical Engineering.

Davison, C. H., Lyme, Conn.-Course, Stationary.

Dunn, J. Howard, Vanderbilt, Pa.-Course: Electrical.

Erskine, Harry, Johannesburg, South Africa-Course: Mechanical.

Fogg, Jos., North Adams, Mass.-Course: Electrical.

Friedman, E. M., Bronson, Mich.-Course. Mechanical Drawing.

Fullmer, Geo. M., Saugerties, N. Y.-Course: Electrical.

Hauser, George, Milwaukee, Wis.-Course: Mechanical.

Mention The Technical World.

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. MACHINERY EXHIBIT AT ST. LOUIS.-A RATIONAL BASIS FOR WAGES.-CHAS. C. CHRISTENSEN, M. E.-THE HERSTAL NATIONAL ARMORY.-MOLDING MACHINES.-THE ALTIMETER.-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 FAIR.-NEW MACHINERY OF THE MONTH.-HINTS IN MECHANICAL ENGINEERING.-QUESTIONS AND ANSWERS.

INDUCEMENT:-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.

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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?

A Stylo is a Pencil that writes with Ink-It is not a Pen. There is not a man 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

C

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not

the

old

fash

ioned stylo with

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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 desk they are at their best; even if left there for several days without any cap on they will not leak and will be ready to write the instant the point touches the paper. For ruling purposes they are unequaled. Ruling done with a Stylo is as even and perfect as that done by machinery. If you have a Stylo you have a pencil that is always ready (just like a lead pencil), the advantage being that ink is used.

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How Far Do You Walk
in a Day?

CUT OUT AND MAIL TO-DAY

Modern Machinery, Security Bldg. Chicago GENTIEMEN:Enclosed find

81.00 for which please send Modern Machinery for one year, and in accordance with your offer, please send me, free of charge, One Desk Watch. One Stylo. One Pedometer. (Kindly encercle one desired). Yours truly,

Did it ever occur to you that perhaps you walked miles
just going around your shop or office? Perhaps
you'd like to know. If so, get a Pedometer. A
Pedometer is an ingenious affair that goes when
you go and stops when you stop. You put
it in your pocket like a watch (it's smaller
than a watch, too), and when you want to
know how far you have walked, all you
have to do is to look at the Pedometer,
These instruments have hereto-
fore been very expensive, costing
from ten to fifteen dollars,
but this one has just been
placed on the market. It is
not a toy, but an accurate
and valuable recorder
of distance which any
man will find it worth
while to have.

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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, O.-Course: Electrical.

Kellar, John G., Albany, N. Y.-Course: Mechanical-Electrical.

Kylberg, Sylvester C., Wyoming, Milburn P. O., N. J.-Course: Mechanical-Electrical. Langsdale, B. W., Kansas City, Mo.Course: Mechanical Drawing.

Lindholm, John I., Bridgeport, Conn.— Course: Mechanical-Electrical.

Montgomery, E. G., Topeka, Kan.-Course: Heating, Ventilating, and Plumbing.

Osborn, Rex Elmer, Toledo, O.-Course: Mechanical-Electrical.

Petritsch, Jos., Chicago, Ill.-Course: Shop Practice.

Powers, Wm., Montreal, Que.-Course: Electrical.

Richardson, F. M. M., Nashville, Tenn.— Course: Mechanical-Electrical.

Wallace, John D., Chicago, Ill.-Course: Mechanical Engineering.

Winehold, Wm., Wadena, Ind.-Course: Locomotive.

Zito, James, Ft. Casey, Wash.-Course: Electrical.

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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 than Ours, 1 vol.
Gosse's The Microscope, 1 vol. cloth.

At LESS than ONE-THIRD the regular
price. Sent by Freight, not Prepaid
These books should be in every house. The
supply is limited. By filling out the cou-
pon attached and forwarding to us, we
will send the books to you for in-
spection. If satisfactory, send
us 50c within 5 days, and
then $1 a month for 15
months, or $12.50 cash.

Write now to the

Pilgrim Press

175 Wabash Ave. CHICAGO

COUPON

The Pilgrim

Personal Notes

MR. MANGER, of Dawson City, Yukon Territory, writes that there is a regular stampede to the new Tanana placer diggings, that many of his friends are leaving for the newly discovered goldfields.

MR. R. W. COLLINS, of Monterey, Cal., writes: "I was at Salmos for a year, rebuilding a badly run down plant, but May 1st was transferred to the plant at this place, where I have been made Superintendent of the Company's work here and Chief Electrician of the other plants -the Salmos plant having been taken over by the above Company.

Name.

Address.

Press, Chicago

as

Send on approval advertised in September TECHNICAL WORLD, 32 v. set Scientific Library. If satisfactory will pay 50c cash and $1 a month for 15 months. If not will return set within five days.

MR. C. W. DOUGLAS, of St. Louis, Mo., an American School student, is attending the summer school of the Armour Institute of Technology, and taking the courses in Mechanics and Electricity.

Mention The Technical World.

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