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Features

The Rondout Bridge

The Total Solar Eclipse of the 6th of May

D'arrest's Comet

How Screws are Threaded

Chemical Vaporizer and Deodorizer

Improved Hop Press

Radial Tubular Boiler

By L. Hervier

A Beaver Colony

Mechanical Inventions - July 7, 1883

Miscellaneous Inventions - July 7, 1883

Agricultural Inventions - July 7, 1883

Engineering Inventions - July 7, 1883

Communications Received - July 7, 1883

Departments

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    Correspondence - July 7, 1883

  • Recent Inventions - July 7, 1883

  • Notes and Queries - July 7, 1883

  • Business and Personal - July 7, 1883

  • New Books and Publications - July 7, 1883

  • Index of Inventions - July 7, 1883

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July 07, 1883

Beyond XX and XY

Biology. Identity. Equality.