if we send it FREE? Rapid Computer Adding Machine price of only $—if it doesn't send it back at our expellee. It does Rae ork perfectly at any angle--can rest on any desk or on book saver of time and errors. Capacity Save time and money—write or to-day you'd the to try one. Catalogue free. COMPUTER CO. 1940 TrIboao Bldg. (Molls INVENTORS We manufacture all kinds of Machine Novelties. Consult us as to developing perfecting and marketing your patents. MACHINE ACCESSORIES AND NOVELTIES MFG. CO. PROVIDENCE R. I. CONSULTING ENGINEER. SOUTHERN STAMPING & MFG. CO. All Makes All
if we send it FREE? Rapid Computer Adding Machine price of only $—if it doesn't send it back at our expellee. It does Rae ork perfectly at any angle--can rest on any desk or on book saver of time and errors. Capacity Save time and money—write or to-day you'd the to try one. Catalogue free. COMPUTER CO. 1940 TrIboao Bldg. (Molls INVENTORS We manufacture all kinds of Machine Novelties. Consult us as to developing perfecting and marketing your patents. MACHINE ACCESSORIES AND NOVELTIES MFG. CO. PROVIDENCE R. I. CONSULTING ENGINEER. SOUTHERN STAMPING & MFG. CO. All Makes All Prices. Quality Unsurpassed VPTE Amorlean Writing Machine Co. SOS Broadway N. Y. THE VISITING WARSHIPS—A COMPARISON. BOSTON MASS. Hardening Temper Forging of Steel By JOSEPH V. WOODWORTH Size 6X x93i inches. 288 pager. 201 illustra tions. Price $ postpaid The American Steel Worker By E. R. MARKHAM Size SX z8 inches. 367 pages. 163 illustra tions. Price $ postpaid MUNN & COMPANY Inc. Publishers 361 Broadway New York New York Model and Experimental Works INVENTIONS DEVELOPED. SPECIAL MACHINERY 442 East 166th Street New York N. Y. DRYING MACHINES For Granular Materials S. E. WORRELL NOVELTIES & PATENTED ARTICLES Learn Watchmaking TheBall Transmission We have just issued a new editior of our Catalogue of Scientific and Technical Books which contains 144 pages and a copy will be mailed free to any address on application. CHIEF DRAFTSMAN Practical Drafting Detailing Designing I know exactly the quality and quantity of practical train hold a position and advance to highest eatery and I give Your best negatives deserve and your poorer negatives need: VELOX It's the only paper that is made with sole reference to the require ments of the amateur negative. tf your developer and finisher doesn't use who does. NEPERA DIVISION Eastman Kodak C ROCHESTER. N. Y. THE 'BEST' LIGHT Inventions developed. Special Machinery. PARKER STEARNS & CO Sheffield Av. B'klyn Anything from
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