Issued from the United States Patent Office SAFETY ATTACHMENT FOR HATCHWAYS—James MOTION FOR PRESERVING ROLLING CONTACT. &C VALVE GEAR FOR STEAM ENGINES—SaMl. SWSX ELEVATING WATER BY COMPRESSED AIR—Archi-, scientific american, 1857-06-27
Issued from the United States Patent Office SAFETY ATTACHMENT FOR HATCHWAYS—James MOTION FOR PRESERVING ROLLING CONTACT. &C VALVE GEAR FOR STEAM ENGINES—SaMl. SWSX ELEVATING WATER BY COMPRESSED AIR—Archi-, scientific american, 1857-06-27
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