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The New Steel Floating Derrick at The Brooklyn Navy Yard

The Falling Off in Speed of Our War Ships

The Great Guns of The Japanese Navy

A Grate for Furnaces, Ranges, Etc.

An Improved Lock

An Improved Casing for Steam Pipes

A New Railroad Tie, Rail Fastener, and Rail

A Double Combination Lock

An Improved Hay Stacker

An All-Metal Spring Vehicle Wheel

A Safety Device for Inclined Roads

Ampere and Volt Analogies

By T. O'conor Sloane

Universal File Handle

Destructive Winter Floods in Connecticut

The Care of the Feet

Scientific American Building Edition- March 21, 1891

List of Books on Electricity

Experimental Science- March 21, 1891

By Geo. M. Hopkins

The Scientific American- March 21, 1891


  • Recommended

    New Books and Publications- March 21, 1891

  • Useful Books

  • Departments

    Recently Patented Inventions- March 21, 1891

  • Index of Inventions- March 21, 1891

  • Business and Personal- March 21, 1891

  • To Inventors- March 21, 1891

  • Notes & Queries- March 21, 1891

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March 21, 1891

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