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The Baltimore Steam Battery

The War

Operations of the Secessionists

Subjugation of the South

Derangement and Adjustment of Ships' Compasses


War and Inventions

Fortress Monroe

The People Govern

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

To Our Readers

The Patent Office—Patent Claims

Thayer's Improvement in Harvesters

Calkin's Transparent Eye Shade or Occhiombra


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    Notes and Queries - May 25, 1861

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May 25, 1861