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Congressional Inquiries Concerning the Patent Office

Recent Lymph Tests and Examinations for Tubercular Disease in Cattle

An Improved Ice Plow

An Improved Rotary Engine

An Improved Dump Cart

Mr. Tesla's Experiments on Alternating Currents of Great Frequency

An Improved Water Register

An Improved Fence Machine

An Improved Furnace

The Western Union Central Telegraph Office and Plant in New York City

An Experiment in Acoustics

By Geo. M. Hopkins

Distinguished Electricians

The Dedication Ceremonies

An Improved Carpenter's Square


  • From the Editor

    To Inventors- March 26, 1892

  • Recommended

    New Books and Publications- March 26, 1892

  • Departments

    Business and Personal- March 26, 1892

  • Notes and Queries- March 26, 1892

  • Recently Patented Inventions- March 26, 1892

  • Index of Inventions- March 26, 1892

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