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Features

Improved Napping Machine

Recipes and Experiments - August 31, 1872

Mold For Casting and Chilling Sleigh Shoes

Law's Shuttle Binder

How to Make a Cheap Hydrogen Lamp

Manufacture of Pins

Spring Power for Sewing Machines

Goodridge's Automatic Lamp Extinguisher

Security against Thieves

William Bridges Adams

Tunnel under the Harlem River, New York

The International Statistical Congress

The International Exposition at Vienna, 1873

Terrestrial Magnetism

Old and New Steam Engines

Improvements that are much Needed

Diamonds in Arizona

A New Suspension Bridge

A New Canal Steamer

Why It Has Been So Hot

The New Railways across the Continent

The Meteors of August Tenth

The Electrical Railway Alarm

The Coolest Place in New York

Promotions at the Patent Office

Letter from Professor R. H. Thurston - August 31, 1872

Scientific and Practical Information - August 31, 1872

Recent American and Foreign Patents - August 31, 1872

New Patent Law in Canada - August 31, 1872

Departments

  • From the Editor

    Answers to Correspondents - August 31, 1872

  • Letters

    Correspondence - August 31, 1872

  • Recommended

    New Books and Publications - August 31, 1872

  • Departments

    Notes and Queries - August 31, 1872

  • Business and Personal - August 31, 1872

  • Index of Inventions - August 31, 1872

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August 31, 1872