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Ericsson's Destroyer and its Submarine Gun

Exhibition of the New York Microscopical Society

Position of the Planets in May

An Improved Gas Engine

A Motor to Drive Small Machines

A Trace-Holding Whiffletree Attachment

An Improved Car Door

The Grant Monument

Interesting Tricks

Logging in Minnesota

The British First Class Cruiser Edgar

Novel Toys


  • Letters


  • Recommended

    New Books and Publications- April 30, 1892

  • Departments

    Recently Patented Inventions- April 30, 1892

  • Notes and Queries- April 30, 1892

  • Index of Inventions- April 30, 1892

  • Business and Personal- April 30, 1892

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis