. Scientific American Volume 85 Number 01 (July 1901) . H B C Of m Cekpbone. A FKACTICAL $* postpaid to any address. An 11(1 to (Uite, OTiti])reh«iisive hau(lli(nik on the , theory, care and iiiaHageiiieiit tf Ielejjhciiea THEO. AUDEL & CO., Publishers Avenue, NEW YORK. List (if contents sent upon rei|uest. RUBBER STAMP MAKING.— THIS article describes a simple method of making rukherstamps with inexpensive apparatus. A thoroughlypractical article written by an amateur who has had ex-perience ni rubber stamp malting. One illustrationContained m Sup


. Scientific American Volume 85 Number 01 (July 1901) . H B C Of m Cekpbone. A FKACTICAL $* postpaid to any address. An 11(1 to (Uite, OTiti])reh«iisive hau(lli(nik on the , theory, care and iiiaHageiiieiit tf Ielejjhciiea THEO. AUDEL & CO., Publishers Avenue, NEW YORK. List (if contents sent upon rei|uest. RUBBER STAMP MAKING.— THIS article describes a simple method of making rukherstamps with inexpensive apparatus. A thoroughlypractical article written by an amateur who has had ex-perience ni rubber stamp malting. One illustrationContained m Supplkment 1110. Price 10cents. Forsale by Munn & Co. an€ all newsdealers GAS ENGINEIGNITERS for Marine. Stationary andAutomobile engines. Willsave their cost many timesover in one year. Writ© for uanisle & Finch 233 E. CliftoD Ave., CiEciniiati, ROTARY PUMPS AND ENGINES. Their Origin and Development.—An important series ofpapers giving a historical resume of toe rotary pumpand engine from 1688 and illustrated with clear draw-ings showing the construction of various forms ofpumps and engines. 38 illustrations. Contained inSUPPLEMENTS 111(9, 1 11 o, 1111. Price 10 centseach. For sale by Munn & Co. and all newsdealers. 12=inch Pipe cut off andThreaded wKli case by oneman and a FORBES Smaller sizes ]easy. Send for Calaloifiu:Machine No. 30. THE CURTIS & CURTIS &. h. 6 Garden S1,, Bridgeport, Conti 10 DAYS TRIAL to responsible parties. DAUS TIP TOPIsi written original and 50 copies from typewriter. It takesan expert to tell tbe duplicates from the DAUS DUPLICATOR 5 HanoverSt., NewYork Buildiiid EditionScientific American MONTHLY, $ PER ANNUM. SINGLE NUMBERS, 25 CENTS. The July Number contains a Talk with Mr, John M. Carrfere on the Pan-American Exposition. Another


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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901