Volume 2, Issue 20
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Features
Improved Stave Machine
Literary and Scientific Notices - May 12, 1860
Journal of Patent Law
Ancient Ruins in the United States
Explosions in Coal Mines
MaCaulay's Companions in the Tomb
Grist Mills and Milling
Combined Harrow and Seed-Sower
Bodies Falling through the Air
American Naval Architecture
Editorial Correspondence
The Hexagonal Cell of the Honey-Bee
Magnitude of Southern Railroads
Polytechnic Association of the American Institute
Defects of Calf-Skin Leather
A Column of Varieties
Improved Oscillating Engine
The Achievements of Science
Is a Patent Liable to Levy and Sale on Execution?
American Type-Setting Machines
The English Police
New York Markets - May 12, 1860
Foreign News and Markets - May 12, 1860
Weekly Summary of Inventions - May 12, 1860
Patent Claims - May 12, 1860
Issued from the United States Patent Office