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The World's Columbian Exposition

The Engineer and the Sailor

A Gauge for Use in Assembling the Parts of an Engine

A Souvenir or Medal Calendar

An Improved Piano Tuning Pin

Schmidt's Improved Window Frame

An Improved Rail Support

Improved Rapid Firing Guns

A Convenient Memorandum Book

The Monterey

Our New 12-Inch Mortars

The Okaw River Bridge, Illinois

A Luminous Waterfall at the Late Frankfort Electrical Exposition

Recent Additions to the Navy

Wonderful Growth of Hair of Horse's Mane and Tail


  • Letters

    Correspondence- December 19, 1891

  • Recommended

    New Books and Publications- December 19, 1891

  • Departments

    Recently Patented Inventions- December 19, 1891

  • Business and Personal- December 19, 1891

  • Notes and Queries- December 19, 1891

  • Index of Inventions- December 19, 1891

  • To Inventors- December 19, 1891

  • Patents! - December 19, 1891

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