IMPROVED TOOLS FOR THREADING BOLTS AND NUTS. The Spontaneous Combustion of Coal. An International Coinage. A NEW BLOWPIPE. Bicarbonate of Soda a Toothache Remedy. Fig. 1THE PRATT AND WHITNEY COMPANY'S BOLT CUTTER., scientific american, 1876-02-19
IMPROVED TOOLS FOR THREADING BOLTS AND NUTS. The Spontaneous Combustion of Coal. An International Coinage. A NEW BLOWPIPE. Bicarbonate of Soda a Toothache Remedy. Fig. 1THE PRATT AND WHITNEY COMPANY'S BOLT CUTTER., scientific american, 1876-02-19
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