RECENT INVENTIONS. New Alcohol Cock. New Tube Cutter or Expander. Device for Laying and Holding 'Underground Elec tric Wires. Reversible Plow. Ammonia for Extinguishing Petroleum Fires. Novel Telegraphic System. Grape Leaves for Pickles., scientific american, 1882-10-21


RECENT INVENTIONS. New Alcohol Cock. New Tube Cutter or Expander. Device for Laying and Holding 'Underground Elec tric Wires. Reversible Plow. Ammonia for Extinguishing Petroleum Fires. Novel Telegraphic System. Grape Leaves for Pickles., scientific american, 1882-10-21


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