AN IMPROVED SCREW DRIVER. IMPROVED PITLSATORY WOOL WASHING MACHINE. A NEW SCREW CUTTING DIE. Fig. 2SCREW PLATE WITH BRION'S DIE. Substances Liable to Spontaneous Combustion. AN IBIPROVAD ROAD GRADER AND DITCHER. PERRY'S ROAD GRADER AND DITCHER. 2 MORGAN'S SCREW DRIVER. BRION'S SCREW CUTTING DIE. IMPROVED PULSATORY WOOL WASHING MACHINE. Fast Railroading. hour., scientific american, 1889-01-19
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