Scientific American 1870 to 1879

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1875-05-08: Walsh's Coffer Dam1875-05-15: Improved Shears for Cutting Bar Iron1875-06-22: Draper's Fulling Mill.1875-05-29: Randolph's Virginia Ditcher.1875-06-05: Randolph's Virginia Ditcher.1875-06-12: Wolff's Triple Steam Boiler - 61875-06-19: Flynn's Improved Cotton Gin Feeder1875-06-26: The Grand Central ' Depot, New York City1875-07-03: Hot Drafts for Steam Boiler Furnaces1875-07-10: Hanson's Flanging Machine.1875-07-17: Gard's. Brick Machine And Transporting Apparatus1875-07-24: Tweddle's Hydraulic Riveting Machine.1875-07-31: Twibill's Fuel Economizer1875-08-07: Improvement in the Ventilation of Railway Tunnels1875-08-14: Blackman's Wood·carving Machine1875-08-21: View of Hell Gate From Top of Coffer Dam1875-08-28: Berryman's Feed Water Heater And Purifier1875-09-04: Power Punch And Shearing Machine
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1875-08-07: Improvement in the Ventilation of Railway Tunnels

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