CUTTING GEAR WHEELS. A Scientific Inter-Collegiate Contest GEAR WHEEL CUTTING MACHINE. BESSEMER'S OSCILLATING SALOON STEAMER. The End of the World., scientific american, 1875-01-30
CUTTING GEAR WHEELS. A Scientific Inter-Collegiate Contest GEAR WHEEL CUTTING MACHINE. BESSEMER'S OSCILLATING SALOON STEAMER. The End of the World., scientific american, 1875-01-30
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