Features
Improved Turret
The Most Important American Discoveries and Inventions
Iron-Clad Ships of War
J. Scott Russell's Report on Gun-Cotton
The World's Indebtedness to Science
Polytechnic Association of the American Institute
Godwin's Patent Lubricator
Miscellaneous Summary
Navy Committee to Examine Inventions
Recent American Patents
The Laws of Expansion
Distilled Water for High Pressure Engines
Submarine Firing--Are Armor-Plates Worthless?
Wines, Almonds, and Olives in California
The Whiskey Controversy
Patent Claims
Patents Granted for Seventeen Years!
Rates of Advertising
To Our Readers
The Cheapest Mode of Introducing Inventions
A Valuable Work for Inventors Patentees and Manufacturers
Improved Hand-stamp, The Earth's Temperature in Palaeozoic Times
Departments
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Correspondence
Notes and Queries
