Volume 29, Issue 5
You are currently logged out. Please sign in to download the issue PDF.
Features
An Austrian Farmer's Entertainment
Another Arctic Expedition Begun
French Telegraphy at the Exposition
Latent Heat
Scientific and Practical Information - August 2, 1873
Simple Tests for Minerals
The Use of Zinc
A Substitute for the Bell Cord
Improved Propeller
New Safety Pump for Sea Going Steamers
Improved Ox Bow
Patent Pig Feeder
Improvement in Bricks
The Pernyi Silkworm
New Tool Holder for the Slide Rest
On the Manufacture of Vinegar
The Great Exposition--Letter from United States Commissioner Professor R. H. Thurston
Combined Cradle and Rocking Chair
Tucking Attachment for Sewing Machines
Improved Chain Propeller
Baron Von Liebig
Engineering Notes - August 2, 1873
Decisions of the Courts - August 2, 1873
Recent American and Foreign Patents - August 2, 1873
Value of Patents
Practical Hints to Inventors