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Features

Improved Caloric Engine

“Mind Your Business.”

The Induced Current

The Rebacking of Paintings

Overthrow of the Barb Fence Patents

Round Noses vs. Diamond Shape

American Astronomical Society

The French Physical Laboratories

The Columbia Tricycle

Portable Meat Safe

The Influence of Storms upon Water Traps

Mixer for Carbonic Gas and Water

Making the Deaf to Hear

Pressure Gauge Testing Apparatus

A Quadricycle for Land and Water

The Giant Locust

Electrical Railway Signaling

Farm Hand Carts

Mechanical Inventions

Engineering Inventions

Miscellaneous Inventions

Agricultural Inventions

Departments

  • Departments

    Correspondence

  • Recent Inventions

  • Notes and Queries

  • Business and Personal

  • Index of Inventions

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The Essential Guide to the Modern World

The Essential Guide to the Modern World