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Windage in Cannon
To Our Readers
To Coat Iron with Brass, Improved Mechanical Blow-Pipe
The Polytechnic Association of the American Institute
The Events of the War
Romance of the Steam Engine
Recent American Inventions
Patent Claims - May 4, 1861,
Issued from the United States Patent Office
Military and Naval Inventions
Machine Electricity—Electrotyping—Telegraphing—Electric Light
Lyons' Improved Lock Seal
Improvements for the Times—Suggestions to Inventors
History of Water Gas for Light—Frauds and Patents
Exciting Question—Working Steam Expansively
Cotton and War
Commander Dahlgren on Iron-Plated Ships
Clark's Expansive Bit
Arrival of Major Anderson and the Garrison of Fort Sumter
A Strange, a Solemn, a Stirring Sight
Letters to the Editors
Correspondence - May 4, 1861
Notes and Queries - May 4, 1861
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