MACHINE FOR GRINDING BANDS ON GOBLETS. A Botanist in the Field. BURSTING OF FLY-WHEELS. BY GEO. X. HOPKINS. NEW INVENTIONS., scientific american, 1881-04-23

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MACHINE FOR GRINDING BANDS ON GOBLETS. A Botanist in the Field. BURSTING OF FLY-WHEELS. BY GEO. X. HOPKINS. NEW INVENTIONS., scientific american, 1881-04-23

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