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The Baltimore Steam Battery

The War

Operations of the Secessionists


Derangement and Adjustment of Ships' Compasses

Subjugation of the South

War and Inventions

The People Govern

Fortress Monroe

General James' Projectile

Letter from our Washington House

History and Index of Articles on Implements of War, Rifles, Shooting, and Experiments in Gunnery, Published in the Scientific American

The Patriotic Contributions

The Patent Office—Patent Claims

To Our Readers

Calkin's Transparent Eye Shade or Occhiombra

Thayer's Improvement in Harvesters


  • Departments

    Notes and Queries - May 25, 1861

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