h the copies are made; ho w to apply the written letter to the pad ; how to take off copies of the letter. oo Contained in SCIENTIFIC AMERICAN SUPPLEMENT, NO. 43s. Price 10 cents. For sale at this office and by all Address : R vewsdealers in all parts of the countrv. ‘STEEL ALPHABETS. Brands,… … tectly safe Motor for all places and 3 purposes. Cost of operation about one PRINTING INKS. cent an hour to each indicated horse FREE BY MAIL. power. For circulars, etc., address HE ‘Scientific American” is printed with CHAS, Charter Gas Engine Co. Eeonomy, ENEU JOHNSON & COS . Tenth and Lom. P.O.…
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