382 Improved Fly-Trap. Improved Balanced Slide Valve. New Caloric Engine. T INVENTORS MECHANICS AGRICULTURALISTS. PROSPECTUS. MECHANICAL JOURNAL IN THE WORLD JANUARY 11865. LAKE'S FLY-TRAP. HOWELL'S BALANCED SLIDE VALVE. - mammy, scientific american, 1865-06-10


382 Improved Fly-Trap. Improved Balanced Slide Valve. New Caloric Engine. T INVENTORS MECHANICS AGRICULTURALISTS. PROSPECTUS. MECHANICAL JOURNAL IN THE WORLD JANUARY 11865. LAKE'S FLY-TRAP. HOWELL'S BALANCED SLIDE VALVE. - mammy, scientific american, 1865-06-10


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