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Features

Improved Wool-drying Apparatus

The War

Thermometer as a Steam Pressure Gage

The Power of a Moving Body—The Simple Facts of the Case

Social Science Congress

The American Photographical Society

Glass for Leyden Jars

Information as to the Patentable Novelty of Inventions

The Bombardment of Fort Hatteras—Shells and Big Guns

Phenomena Attending Combustion—Gas and Candle Light

The Influence of War on Inventions

New Engine Condensers

Patents Granted for Lubricating Compounds

The Armstrong Gun and Angulated Iron Plates

Patent Claims - September 21, 1861

Recent American Inventions

Patents in the Southern Confederacy

Work and Power

Instructions about European Patents

The New Gunboats

Departments

  • Letters

    Correspondence - September 21, 1861

  • Departments

    Notes and Queries - September 21, 1861

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