TECHNICAL WORLD MAGAZINE Are There Men on Mars? BY PROF. WM. H. PICKERING Harvard University Observatory Making Silk Out of Gun-Cotton BY CLARENCE HUTTON On the World's Last Frontier BY RICHARD A. HASTE Water Motors Give Free Power UR faucet water motors bring a hydraulic water plant into every home and Workshop, cheapest power in the world. Our faucet water motors can be attached instantly to any threaded faucet. Quickly attached to any smooth faucet by our universal coupling. Faucet water motors are used for buffing, polishing and grinding. Sharpens scissors or other edged tools. Cleans silverware, cut glass, kitchen utensils and all metal surfaces. Runs all kinds of light machines like lathe, saw, fan, printing press, dynamo, washing machine, sewing machine, etc. Washes milk bottles, glasses, etc. We are dealers in water motors which give from one-sixteenth to ten horse power. We have large water motors for the purpose of running dental lathes, ice cream freezers, organ bellows, ceiling fan, etc. Our motors and accessories are fully described and illustrated in Morton's Water Motor Book. This book will be sent absolutely free to any one upon request. It is fully illustrated and contains seventy pages-largest water motor book in the world. Morton's Little Marvel Faucet Water Motor outfit is now being sold for $3.00 complete, consisting of water motor with strong, iron case, superior emery wheel, polishing and buffing wheels, seasoned wood pulley, polishing material, leather belting, wrench, oil can, screw driver, belt hook, and complete printed instructions. This outfit is worth $6.00 at retail price, but a remittance of $3.00 buys it. The Divine Faucet motor and complete outfit which we list at $6.00 we sell for $4.00. The Demon Hydraulic Engine, with substantial iron case, 6 inch water wheel, for power purposes, is now being sold by us for $6.00 We will guarantee this motor to run any make washing machine or will return the money. This motor lists at $10.00. Our price is $6.00, with leather belting and pulley for either flat or round belting. Call and see the motors in operation, or write for free Water Motor Book. Send us $3.00 for Morton's Little Marvel Water Motor. If it is not in every way satisfactory it may be returned at our expense and your money will be immediately refunded. Agents Wanted. MORTON MFG. COMPANY, Dept. 0, 130 Fulton Street, NEW YORK Merchandise From Sheriffs' and Receivers' Sales Including Material From the $50,000,000 St. Louis World's Fair The Chicago House Wrecking Co. occupies a very important position in the mercantile world. Our methods are not only a revelation but a revolu tion. We are the only concern on earth that makes a business of purchasing entire exposi tions and other large institutions. We are now engaged in removing and placing upon the market the millions of dollars worth of material from the St. Louis World's Fair. Therefore we are in a position to furnish material for the con. struction of public buildings, private residences, factories or hotels. We can supply all kinds of machinery, mill supplies, electrical apparatus, plumbing material, etc., etc., at prices that will strongly appeal to the economi cal buyer. In addition to purchasing expositions we are con stantly buying at SHERIFFS', RECEIVERS' AND ASSIGNEES' SALES, where we obtain large stocks of brand new merchandise. This page of tempting offerings is an accurate index to thousands of inducements that remain unpublished, and the price is lower than you ever paid for such exceptional qualities. Space does not permit mentioning a thousandth part of these wonderful values, but we have selected some of those representative of the remarkable character of our stock. Through the entinr display, however, the richness of qualities is i-e variable. It is the greatest aggregation of bargains ever placed before the American public. It has stirred the country from one end to the other. We guarantee every statement -money refunded to any one not satisfied with their purchases. Electrical Material A million dollars worth of high-grade apparatus of every kind for sale. Rubber covered Copper Wire, sizes No. 14 to 500,000 C. M. Waterproof and Slow Burning Wire, sizes No. 14 to 650,000 C. M. Lead Covered Cable, all sizes from No. 14 to 500 000 C. M. Lamp Cord. 200,000 new and used Incandescent Lamps, ranging from 5 to 13 cts. 100,000-No. 9171 Receptacles-at 3 cents each. Tubes, Cleats and all other kinds of electrical apparatus. 50 Electric Motors from 1 to 40 H. P. 25 Generators from 5 to 200 K. W. Tele phones, Telephone Wire, Brackets, etc. 100 million feet well seasoned Lumber from Send us your Lumber bill for Save 30 to 50 per cent if you buy at once. We are offering this lumber for sale at prices far below the original cost. You should take advantage of this rare opportunity at once, as prices on lumber are advancing. Quick delivery to those who purchase now. Full description, information and prices in special World's Fair Catalogue. Factory Enclosures 1,000,000 square feet of %-inch ribbed factory glass set in sash, and ranging in sizes from 2 ft. x 2 ft. 8 in. to 8 ft. x 18 ft., practically any size you may require. Here is an opportunity to enclose your factory at very low cost. We are quoting this material in large lots at 7%1⁄2 cents per square foot. We can load it in car lots from either our Chicago or St. Louis headquarters. Roofing Glass 250,000 square feet of and -inch thick ribbed Roofing Glass, 18 inches wide, lengths up to 10 feet. Special low prices in carload lots. ASK FOR OUR SPECIAL CATALOGUE No. 586. It lists all the various articles we have for sale. Kindly fill in the coupon in the lower left hand corner. Cross the items in the advertisement that Interest you most, and we will send you full descriptions and mail you our 360 page catalogue. Chicago House Wrecking Company 35th and Iron Streets, Chicago Steel Roofing $1.75 per 100 square feet. Painted both sides, durable, economical, for houses, sheds, barns, etc. This is our No. 15 grade, sheets 2 ft. x 2 ft. Price is for flat. Cor. rugated or "V" crimped costs $1.85. Sheets 6 and 8 feet long, cost 25c per square additional. We prepay freight in full to all points east of Colorado, except Oklahoma, Texas and Indian Territory. We have other grades. Ask for our special Roofing Circulars. SEND US SPECIAL EXPOSITION CATALOGUE AS ADVERTISED IN THE TECHNICAL WORLD. Name. Address Cyclopedia of Engineering. Four volumes, bound in half morocco. Slightly damaged. Regular price, $18.00. Will sell for $4.00. Address T. C. P., care Technical World Magazine, Chicago. at your home. For a limited time we will give free, for advertising purposes, 96 music lessons for beginners or advanced pupils on either Piano, Organ, Banjo, Guitar, Cornet, Violin or Mandolin (your expense will only be the cost of postage and the music you use, which is small). Established seven years. Hundreds write "Wish I had heard of your school U.S. SCHOOL OF MUSIC, Box 130E, 19 Union Sq., N. Y. teach by mail only and guarantee success. before." Write today for booklet, testimonials and free tuition blank. Address: THE TECHNICAL WORLD MAGAZINE is a monthly magazine, published the fifteenth of each month, preceding date, devoted to the problems of the technical and industrial world, and a treatment of all matters of interest in Applied Science. PRICE: The subscription price is $1. per year, payable in advance; single copies, 10 cents. HOW TO REMIT: Subscriptions should be sent by draft on Chicago, express order, or Post- THE EDITORS invite the submission of photographs and articles on subjects of modern en- decision rendered. Payment will be made on acceptance. Unaccepted material will be returned if |