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Features

The New Electric Light at Hell Gate Lighthouse

Cable Railways for New York City

The Plot Against Patents

Malarial Fevers

The Hostile Patent Bills

Water Line Defense and Gun Shields for Cruisers

Metallic Railroad Tie

Improved Acoustic Telephone

Improvement in the Leclanche Battery

Improved Car Coupling

Improved Hand Truck

Another Curious Case of Freezing

Oil on Troubled Waters

The Twelve Thread Plume Bird

Agricultural Inventions - March 22, 1884

Miscellaneous Inventions - March 22, 1884

Mechanical Inventions - March 22, 1884

Engineering Inventions - March 22, 1884

Departments

  • Recommended

    New Books and Publications - March 22, 1884

  • Departments

    Notes and Queries - March 22, 1884

  • Business and Personal - March 22, 1884

  • Index of Inventions - March 22, 1884

  • Patents

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March 22, 1884