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Features

Casting a Huge Cannon

Driving by Friction

Congress and the Patent Office

Labels and Trademarks

The Greely Expedition

Variations of Speed

Compound and Self-Acting Plug Valve for Wash Basins

Horse Power

Improved Oil Cup

Metallurgic Furnace

Improved Elevator

Bending Machine

Screw Tap

Well Bucket

Conical Press for Treating Beet Pulp

A Practical Method of Estimating Distances

Automatic Wave Lubricating Life Buoy

Engineering Inventions - July 26, 1884

Mechanical Inventions - July 26, 1884

Agricultural Inventions - July 26, 1884

Miscellaneous Inventions - July 26, 1884

Departments

  • Letters

    Correspondence - July 26, 1884

  • Recommended

    New Books and Publications - July 26, 1884

  • Departments

    Business and Personal - July 26, 1884

  • Notes and Queries - July 26, 1884

  • Index of Inventions - July 26, 1884

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July 26, 1884

Beyond XX and XY

Biology. Identity. Equality.