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    Features

    The McDougall Whaleback Steel Vessel

    Fast Boats for the Navy

    The Casino and Pier at the Exhibition

    Guiley's Electrical Block System for Railways

    A One Dollar Photographic Outfit

    Some Suggestions in Microscopy

    By M. Hopkins

    Latham's Grass Collector for Lawn Mowers

    A Warship Rams a Whale

    Rack Attachment for Theater Chairs

    Gunner's Arm Rest

    Drawing of Financial Bills by the Casanova Apparatus

    Great Spools of Wire

    Departments

    • Letters

      Correspondence- July 4, 1891

    • Recommended

      New Books and Publications- July 4, 1891

    • Departments

      Business and Personal- July 4, 1891

    • Recently Patented Inventions- July 4, 1891

    • Notes and Queries- July 4, 1891

    • Index of Inventions- July 4, 1891

    • To Inventors- July 4, 1891

    • Patents- July 4, 1891

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    July 04, 1891

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