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Features

Improved Camera Stand

French Chemists on Austrian Gun-Cotton

Invisible Radiation of the Electric Light

Schleier's Indented Rail

Egan's Kerosene Oil Burner

Farmers' Club

Carleton's Submerged Glass Pump

Resistance of Vessels in Water

Recent American Patents

Ancient Mexican Zodiac

The Lenoir Gas Engine

Salt as a Fertilizer

Foot-Pounds of Work

Cheap Solvent for Gold

A Unit of Heat and Specific Heat

Special Notices

The Game of Croquet

Miscellaneous Summary

Patent Claims

Issued from the United States Patent-Office

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May 20, 1865

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