f the opportunity Zanesville, Ohio. of securing their inventions in foreign countries at once, so as to have their patents ready to negotiate during the OGERS’ tee OF SODA BOILER coming summer. eae bBo G. ROGER: S & CO., Madison, Ind. VENT es For cost of patents in the different countries and the… … THIRTY-FIRST YEAR. CREW PROPELLERS, THEIR SHAFTS AND FITTINGS. By Hamilton W. Pendred,M. E. An able treatise, sho Ape vor resent ractice, ite sdyan” VOLUME XXXIV.—NEW SERIES. tages in No.4 4 of SCIENTIFIC J AMERICAN SUPPLE- ects. = MENT. To be had at this office, and of all news agents. The…
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