INDEX OF INVENTIONS Letters Patent of the United States were Granted in the Week Ending November 20 1877 AND EACH BEARING THAT DATE. THIRTY-THIRD YEAR. Only $ a Year including Postage. Weekly 52 Numbers a Year., scientific american, 1878-01-05
INDEX OF INVENTIONS Letters Patent of the United States were Granted in the Week Ending November 20 1877 AND EACH BEARING THAT DATE. THIRTY-THIRD YEAR. Only $ a Year including Postage. Weekly 52 Numbers a Year., scientific american, 1878-01-05
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