COMMUNICATIONS RESEIVED. [OFFICIAL. INDEX OF INVENTIONS Fog wawa Letters Patent of the United States were Granted in the Week ending April 27 1875 AND EACH BEARING THAT DATE. SCHEDULE OF PATENT FEES. CANADIAN PATENTS. Back Page 81.00 a line. Inside Page 75 cents a line. TENTH INDUSTRIAL EXHIBITION Mechanics' Institute of San Francisco. IFP.VICENT COLD ROLLED SHAFTING. 1Viodel Engines. FOR SALE C a st i n gs, scientific american, 1875-05-29
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