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The Berliner Microphone Patent

The Two Great Ship Canals

Singular Accident to a Steamer at Sea

A Shifting Device for Elevators

An Improved Traction Engine

An Improved Wrench

The Lovell Diamond Cycle

A Labor-Saving Screw Driver

New Method of Gas Supply for New York City

Distribution of Hot Water at Paris

Natural Oyster Grounds of South Carolina

The Volcano Mauna Loa

Strange Hybrids

By F. L. Oswald


  • Letters

    Correspondence- February 18, 1893

  • Recommended

    New Books and Publications- February 18, 1893

  • Departments

    Business and Personal- February 18, 1893

  • Notes and Queries- February 18, 1893

  • Recently Patented Inventions- February 18, 1893

  • Index of Inventions- February 18, 1893

  • To Inventors- February 18, 1893

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February 25, 1893

Science for the Modern World