APRIL 29 1882 1 COMMUNICATIONS RECEIVED. INDEX OF INVENTIONS Letters Patent of the United States were Granted in the Week Ending EACH BEARING THAT DATE., scientific american, 1882-04-29


APRIL 29 1882 1 COMMUNICATIONS RECEIVED. INDEX OF INVENTIONS Letters Patent of the United States were Granted in the Week Ending EACH BEARING THAT DATE., scientific american, 1882-04-29


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