English Patents Issued to Americans. EXPORT EDITION. PUBLISHED MONTHLY. Back Page each insertion 51.00 a line. SEND 30 CENTS BY MAIL AND GET THE GEOLOGICAL ANTIQUITY OF THE PHONOGRAPH AND ITS FUTURE. THE The Most Popular Scientific Paper in the World. THIRTY-THIRD YEAR. 37 Park Row New York. TRADE MARKS. NOW HEADY., scientific american, 1878-08-10
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