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Features

The Longest Tunnel in the World

A New Estimate of the World's Age

When are Laws Discovered?

The Power of Vibration Harnessed

Molecular Chemistry.--No. 1

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

American Industries.--No. 12

Testing Lubricants

A Few Novelties

New Agricultural Inventions - May 17, 1879

Disinfection

The Patentees' Protective Association

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

  • 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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May 17, 1879

Reanimate Your Brain

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