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    Features

    Submarine Mines on the High Seas

    A World's Congress of Academies

    The N-Rays: Are They Real or Illusory?

    Charles H. Haswell's Ninety-Fifth Birthday

    Belgian and American Electric Lifting Magnets

    By Frank C. Perkins

    Electrically-Operated Versus Steam-Driven Mine Hoists

    Electrochemical Phonograph

    The Japanese Naval Disasters

    New form of Radiation

    The Manufacture of Straw Hats

    By W. Frank M'clure

    The Petroleum Reservoirs of California

    By H. A. Crafts

    An Arcade for New York City

    Wreck of the Russian Cruiser Bogatyr

    Photography of Jupiter's Satellites

    The Pielock Superheater System

    By Alfred Gradenwitz

    Compensating Device for Rope Tramways

    A Novel Fly-Catcher

    Rock Drill Attachment

    Patent Department

    Improved Railway Chair

    An Improved Portable Tent

    A Tension Regulator for Overhead Cables

    A Clothing Rack

    Device for Distributing Noxious Fumes

    Business and Personal Wants

    Departments

    • Departments

      The Heavens in June - June 4, 1904

    • Correspondence - June 4, 1904

    • Recently Patented Inventions - June 4, 1904

    • Index of Inventions - June 4, 1904

    • New Books, Etc. - June 4, 1904

    • Notes and Queries - June 4, 1904

    • Patents - June 4, 1904

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    June 04, 1904