COMMUNICATIONS RECEIVED. INDEX OF INVENTIONS Letters Patent of the 'United States were Granted in the week Ending November 21 1876. AND EACH BEARING THAT DATE., scientific american, 1877-01-11


COMMUNICATIONS RECEIVED. INDEX OF INVENTIONS Letters Patent of the 'United States were Granted in the week Ending November 21 1876. AND EACH BEARING THAT DATE., scientific american, 1877-01-11


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