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Features

Concentrated Solar Rays

The President's Message and the Vienna Exposition

The Vienna Exposition--Professor Thurston Explains

A Badly Constructed Boiler

Steam Engine Economy and Steam Boiler Economics

On the Resistance of Buildings Stones to Fire

Germany in the Vienna Exposition

Torpedo Warfare

Horace Greeley

New Burlington House, Piccadilly, London

Button Hole Cutter

New Method of Brewing

A Patent Poisonous Pavement

Patents in Japan

Another Terrible Boiler Explosion in Ohio

Key Seat Cutting Machine

Improved Drawing Table

The New Prussian Rifle

A Novel Railway Ferry Boat

Phineas L. Slayton

Decisions of the Courts

United States Circuit Court, Eastern District of New York

Answers to Correspondents

Recent American and Foreign Patents

Communications Received

Value of Patents, and How to Obtain them

Practical Hints to Inventors

Patent Cold Rolled Shafting

Departments

  • Departments

    Correspondence

  • New Books and Publications

  • Business and Personal

  • Notes and Queries

  • Index of Inventions

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December 21, 1872

Help Us Reforest the Mississippi River Valley