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Features

The New Post Office, Melbourne, Australia

Experiences of a Bureau Officer

A Chapter on American Geology

By Charles Morris

Wrought Iron Bridges for the Nicolai Railway of Russia

Experimental Investigation of a New Force

By William Crookes

Mechanical Movement for Churns, Washing Machines, Etc.

Paget's Gipsy Winch

Engravings of Inventions and Machinery

A Valuable Book

Gold and Silver Waste

The Late General Rodman

Dr. Crookes on Psychic Force

The Westfield Explosion

Narrow Gage Railways

Will Gunpowder Explode in a Vacuum?

New Application of the Oxyhydrogen Light to the Separation of Metals, by Tessie Du Mo-Tay of Paris, France

How Scientific Men Work

Editorial Summary- August 12, 1871

Artificial Leather--Utilization of Leather Scraps and Cuttings

Re-Agent to Detect Nitric Acid

Ozonized Ether

Answers to Correspondents- August 12, 1871

Queries- August 12, 1871

Recent American and Foreign Patents- August 12, 1871

Official Lists of Patents- August 12, 1871

Issued by the U. S. Patent Office

Applications for Extension of Patents- August 12, 1871

Departments

  • Letters

    Correspondence- August 12, 1871

  • Recommended

    New Books and Publications- August 12, 1871

  • Departments

    Business and Personal- August 12, 1871

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Self-Awareness or Illusion?

Self-Awareness or Illusion?

Solving the “Hard Problem”