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Patents to Foreigners-Government Purchase of Patents

A Suggestion as to Overhead Wires

The Maximum of Sun Spots

Improved Breast Drill

Folding Step Ladder

An Improved Tool Handle

Novel Door Check

Improved Furnace Grate

New Buildings of Prominence in New York City

[See Frontispiece.]

Dr. Le Plongeon's Latest and most Important Discoveries among the Ruined Cities of Yucatan

( Continued from page 263.)

The Bursting of Gun Barrels

Dynamite Thrown from Cannon by Powder

Improved Permutation Lock

An Improved Fence Post

Mechanical Inventions - May 10, 1884

Engineering Inventions - May 10, 1884

Agricultural Inventions - May 10, 1884

Miscellaneous Inventions - May 10, 1884


  • Letters

    Correspondence - May 10, 1884

  • Departments

    Business and Personal - May 10, 1884

  • Notes and Queries - May 10, 1884

  • Index of Inventions - May 10, 1884

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May 10, 1884

The Antidote to Anti-Intellectualism