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On the State of the Carbon Vaporized in Glow Lamps

Superheated Steam

State Registration of United States Trade Marks

The Purchase of a Reservoir Site

The Rapid Transit Subway Tunnel under the Harlem River

Test of Fireproof Stage Properties in London

The Fifth International Automobile Cup Race

Some Unusual Uses for Fire-Engines

By W. G. Fitzgerald

Japanese Naval Guns

A New Life-Saving Gun

By A. Frederick Collins

A Useful Instrument in the Niagara Falls Power House

By Arthur B Weeks

Insulating Apparatus for Canned Goods to Prevent Ptomaine Poisoning

Business and Personal Wants

If you manufacture these goods write us once and we will send you the name address of the party desiring the information. In every case it is necessary to give the number of the inquiry.


  • Departments

    The Heavens in July - July 2, 1904

  • Correspondence - July 2, 1904

  • Recently Patented Inventions - July 2, 1904

  • Notes and Queries - July 2, 1904

  • New Books, Etc. - July 2, 1904

  • Index of Inventions - July 2, 1904

  • Patents - July 2, 1904

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July 02, 1904

20% Sitewide for President's Day