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The Longest Tunnel in the World

The Power of Vibration Harnessed

A New Estimate of the World's Age

When are Laws Discovered?

American Industries.--No. 12

Molecular Chemistry.--No. 1

Edison's Electric Illuminator and Dr. Draper's Experiments Thirty Years Ago

Testing Lubricants

A Few Novelties

The Patentees' Protective Association


New Agricultural Inventions - May 17, 1879

The Detroit River Tunnel and Bridge

Improved Paper Cutting and Winding Machine

New Cut-Off for Steam Engines

The Kanchil, or Pygmy Musk

By Daniel C. Beard

Natural History Notes

Recent Mechanical Inventions - May 17, 1879

The Calamar

To Inventors - May 17, 1879

Communications Received - May 17, 1879


  • Departments

    Notes and Queries - May 17, 1879

  • Business and Personal - May 17, 1879

  • New Books and Publications - May 17, 1879

  • Index of Inventions - May 17, 1879

  • Patents - May 17, 1879

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis