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Locomotive Boiler Explosion, Wallingford, Conn.

Vital Statistics of Jews in the United States

Students of American History

The American Economic Association

An Improvised Portable Foot Bridge

A Leveler for Use on Meadow Lands, Etc.

An Improved Air Pump Governor

A Compact and Powerful Flooring Clamp

A Pen Holder to Facilitate Making Waved Lines

A Railway Car Fire Extinguishing Apparatus

A Simple and Reliable Trap

The "Iron Gates" of the Danube

Photography of a Cannon Ball in Motion

Small Electric Motor for Amateurs

By Geo. M. Hopkins

Long Splice for Ropes

To Inventors- January 17, 1891

Popular Books- January 17, 1891

The Scientific American - January 17, 1891


  • Letters

    Correspondence- January 17, 1891

  • Recommended

    New Books and Publications- January 17, 1891

  • Departments

    Recently Patented Inventions- January 17, 1891

  • Business and Personal- January 17, 1891

  • Notes & Queries- January 17, 1891

  • Notes and Queries- January 17, 1891

  • Index of Inventions- January 17, 1891

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January 17, 1891

Of Shamrocks and Science

Happy St. Patrick’s Day