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Features

Improved Coasting Sled, Checking Perspiration and More

Rules for Firing Cannon

The Manufacture of “Greenbacks”

Bones

Photographic Items

The Metal Magnesium

Mines in Warfare

Economy of Fuel

Concerning Boiler Explosions

The Steam Car on the Second Avenue Railroad

The Currency Question

The Hecker and Waterman Experiments

The New Law for Measuring Ships

Recent American Patents

Patents Granted for Seventeen Years!

Issued From the United States Patent-Office for the Week Ending August 9, 1864.

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    Notes and Queries

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August 20, 1864

See the World from a Different Perspective

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