Volume 8, Issue 20
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Features
The Whitworth Projectile
Valuable Receipts
Bond's Improved Tourniquet
Horse-Power
The Galvanic Action between Iron and Copper in Vessels
Sewing Machines in Europe
Rockets in Warfare
Reform These Abuses!
Action of Sulphuric Acid Upon Lead
Defectively-Designed Boilers
The New Canadian Patent Bill
The Rebel Shot
Recent American Patents
Patent Claims
Issued from the United States Patent Office