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Features

The Disappearing Gun Carriage

The New Steam Ferry Boat Bremen

A Convenient Hoisting Apparatus

An Automatic Windmill Regulator

Improved Sash Cord Pliers

An Ice Machine in Which a Continuous Cycle of Work is Effected

Automatic Distributers of Beverages

The Drexel Institute of Art, Science, and Industry

The New Tunnel Under the Thames

Chatauqua

A C Hobbs, the Lock Expert

The Madison Square Garden Weather Vane, the Huntress Diana

Departments

  • Letters

    Correspondence- December 26, 1891

  • Recommended

    New Books and Publications- December 26, 1891

  • Departments

    Recently Patented Inventions- December 26, 1891

  • Business and Personal- December 26, 1891

  • Notes and Queries- December 26, 1891

  • Index of Inventions- December 26, 1891

  • Patents! - December 26, 1891

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December 26, 1891

Beyond XX and XY

Biology. Identity. Equality.

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