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Great Guns

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

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February 27, 1864

Beyond XX and XY

Biology. Identity. Equality.