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Features

The Hydraulic Annexe at the Centennial Exposition

Ocular Color Spectra and Their Causation

Is the Universe Composed Entirely of Hydrogen!

Berthelot's New Electro-Chemical Discoveries

Shall We Change Our Weights and Measures?

A New Theory of Hay Fever

New Gatling Gun

Improved Mortising Machine

Improved Split Wheel

Improvements in Fire Engines

A New Soldering Machine

Potato Pest Poison.

By Charles V. Riley

Practical Mechanism - August 19, 1876

By Joshua Rose

Improved Woodworking Machinery - August 19, 1876

Leland's Pipe Coupler

Two Beautiful Palms

Meteorites - August 19, 1876

By C. A. Young

Recent American and foreign Petents - August 19, 1876

Exhibits of Foreign Technical Schools at the Centennial

New Household Inventions - August 19, 1876

New Agricultural Inventions - August 19, 1876

New Chemical and Miscellaneous Inventions - August 19, 1876

New Mechanical and Engineering Inventions - August 19, 1876

Communications Received - August 19, 1876

The Validity of Patents - August 19, 1876

Departments

  • Letters

    Correspondence - August 19, 1876

  • Departments

    Business and Personal - August 19, 1876

  • Notes and Queries - August 19, 1876

  • Index of Inventions - August 19, 1876

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August 19, 1876

Beyond XX and XY

Biology. Identity. Equality.

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