Volume 4, Issue 18
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Features
Commander Dahlgren on Iron-Plated Ships
History of Water Gas for Light—Frauds and Patents
Machine Electricity—Electrotyping—Telegraphing—Electric Light
Recent American Inventions
Improvements for the Times—Suggestions to Inventors
Romance of the Steam Engine
Windage in Cannon
Arrival of Major Anderson and the Garrison of Fort Sumter
Exciting Question—Working Steam Expansively
Military and Naval Inventions
Cotton and War
The Polytechnic Association of the American Institute
A Strange, a Solemn, a Stirring Sight
The Events of the War
Patent Claims - May 4, 1861,
Issued from the United States Patent Office