The New Post Office, Melbourne, Australia

Experiences of a Bureau Officer

A Chapter on American Geology

Wrought Iron Bridges for the Nicolai Railway of Russia

Experimental Investigation of a New Force

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