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Features

Improved Thrashing and Cleaning Machine

The War

Spectral Analysis

Valuable Experiments in Gunnery

Interesting from Fort Pickens and Pensacola

Cochran's Improved Projectile

Iron-Clad Frigates Again

The New Gunboats

Raising Money for the War

Iron Ships Not Invulnerable

America at the World's Fair in 1861

Steam Wagons for Military Purposes

Railway Accidents

Making Steel Rifled Cannon

Soldier-Health

Patent Claims - July 13, 1861

Recent American Inventions

Instructions about European Patents

To Our Readers

Shields for Resisting Shot in Ships

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    Notes and Queries - July 13, 1861

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July 13, 1861

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