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Reform of the Immigration Laws

An Electrical Life Saver Wanted

A Twin Staircase

The Recent Earthquake in Japan

An Improved Ore Crusher

A New Feed Water Heater and Purifier

Destruction of Emanations of All Kinds without the Use of Chemicals

Utilizing the Water Power of Niagara Falls

A Machine to Roll Hollow Rods

Rain Making in India

What is Electricity?

By Foree Bain

Experiments with Illuminating Gas

By T. O'Conor Sloane


  • Letters

    Correspondence- March 5, 1892

  • To Inventors- March 5, 1892

  • Recommended

    New Books and Publications- March 5, 1892

  • Departments

    Recently Patented Inventions- March 5, 1892

  • Business and Personal- March 5, 1892

  • Notes and Queries- March 5, 1892

  • Index of Inventions- March 5, 1892

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