NEW COTTON CROPPER. Galvanometer. Ph oto-Zinc and Platinum Process. NEW DISINTEGRATING RIFFLES. HUGHES' COTTON CHOPPER. No. 2 DULL RIFFLE WITILOUT CUPS. A RIFFLE SECTION. Diphtheria. HOWLAND'S DISINTEGRATING RIFFLES., scientific american, 1882-05-20
NEW COTTON CROPPER. Galvanometer. Ph oto-Zinc and Platinum Process. NEW DISINTEGRATING RIFFLES. HUGHES' COTTON CHOPPER. No. 2 DULL RIFFLE WITILOUT CUPS. A RIFFLE SECTION. Diphtheria. HOWLAND'S DISINTEGRATING RIFFLES., scientific american, 1882-05-20
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