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Features

Exhibition of the New York Microscopical Society

Position of the Planets in May

Ericsson's Destroyer and its Submarine Gun

An Improved Gas Engine

A Motor to Drive Small Machines

An Improved Car Door

A Trace-Holding Whiffletree Attachment

The Grant Monument

Logging in Minnesota

The British First Class Cruiser Edgar

Interesting Tricks

Novel Toys

Departments

  • Letters

    Correspondence

  • Recommended

    New Books and Publications- April 30, 1892

  • Departments

    Recently Patented Inventions- April 30, 1892

  • Business and Personal- April 30, 1892

  • Index of Inventions- April 30, 1892

  • Notes and Queries- April 30, 1892

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April 30, 1892

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