Volume 7, Issue 1
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Features
Armstrong Guns and Iron-Clad Ships Again --Ironsides Invulnerable
Fatal Explosion of Gun Cotton--Death of a Promising Young Chemist
The London Exhibition
Polytechnic Association of the American Institute
Vanderbilt's Polishing Belt
Experiments with a Submarine Cannon
The New Amendments to the Patent Laws
California State Agricultural Society
Six Good Reasons Why Every Manufacturer, Mechanic, Inventor and Artizan Should Become a Patron of the Scientific American
Locomotive Business in Paterson--a New Dummy Engine
Patent Law Amendments
Recent American Inventions - July 5, 1862
Patent Claims
Issued From The United States Patent Office