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Features

President Garfield's Fatal Wound

Heat, Sun Storms, and Yellow Light

The Storage of Petroleum

The Temperature of Mammoth Cave

By H. C. Hovey

Cut-Off for Electric Lamps

Mechanical Inventions

Improved Steam Engine Piston

Lime-Extracting Heater and Filter

Improved Combination Tool

American Industries.—No. 76

Potatoes and Their Utilization

Agricultural Inventions

The Fontaine Locomotive

Sleeping Fish

Engineering Inventions

Miscellaneous Inventions

Departments

  • Departments

    Recent Inventions

  • New Inventions

  • Business and Personal

  • Notes and Queries

  • New Books and Publications

  • Index of Inventions

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October 08, 1881

Beyond XX and XY

Biology. Identity. Equality.