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The Patent Centennial Celebration

The Reduction of Patent Fees

Build Up The Navy

A Self Adjusting Girth Fastener

An Improved Pipe Hanger

Reversible Blind Hinges

A Tool for Dehorning Calves

An Improved Astronomical Mirror

Electroplating the Dead

A Notable New Pullman Passenger Train

The Chignecto Ship Railway

Automatic Sawdust Feed for Furnaces

An Improved Drawer Stop

The Lovell Diamond Safety Bicycle

An Envelope Gum Moistener

A Convenient Fruit Packing Press

Brownlow & Warner's Truss

Scientific American Building Edition- April 11, 1891

To Inventors- April 11, 1891

Advertisements- April 11, 1891

Inside Page, each insertion – 75 cents a line. Back Page, each insertion – $1.00 a line

Useful Books!- April 11, 1891

Experimental Science- April 11, 1891

By Geo. M. Hopkins

The Scientific American Publications for 1891- April 11, 1891

The Scientific American Established 1846- April 11, 1891

The Most Popular Scientific Paper in the World


  • Letters

    Correspondence- April 11, 1891

  • Recommended

    New Books and Publications- April 11, 1891

  • Departments

    Business and Personal- April 11, 1891

  • Notes & Queries- April 11, 1891

  • Recently Patented Inventions- April 11, 1891

  • Index of Inventions- April 11, 1891

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