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Features

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

An Improved Casing for Steam Pipes

A Grate for Furnaces, Ranges, Etc.

A New Railroad Tie, Rail Fastener, and Rail

An Improved Lock

A Safety Device for Inclined Roads

An All-Metal Spring Vehicle Wheel

A Double Combination Lock

An Improved Hay Stacker

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

Departments

  • Recommended

    New Books and Publications- March 21, 1891

  • Useful Books

  • Departments

    Recently Patented Inventions- March 21, 1891

  • Business and Personal- March 21, 1891

  • Notes & Queries- March 21, 1891

  • To Inventors- March 21, 1891

  • Index of Inventions- March 21, 1891

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March 21, 1891

Confronting Common Wisdom