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Our Available Iron-Ore Supply

Turbine Ocean Steamers

New System of Tunnel Construction

Electric Traction Tests at the Worlds Fair

On Some Novel N-Ray Phenomena

Induced Radio-Activity and Aluminium

By M. Metzenbaum

New Method of Inflating Balloons in War Time

By Edward J. Forster

Automatic Match Lighter Operated by Alarm Clock

The Challenging Yacht "Ingomar"

An Improved Michaud Apparatus

By J. Fid Tristan

The Torpedo Boat in Modern Warfare

Ruins of the Ancient Inca Empire

By Walter L. Beasley

The Small Arms of the Russian and Japanese Armies

New York's Spring Automobile Parade

Business and Personal Wants


  • Departments

    Correspondence - May 14, 1904

  • Recently Patented Inventions - May 14, 1904

  • Notes and Queries - May 14, 1904

  • Index of Inventions - May 14, 1904

  • Patents - May 14, 1904

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