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Features

Improved Sawmill

Notes on Military and Naval Affairs

United States Circuit Court--New Jersey

Ordnance and Gunnery

The Colors of Coal Tar

The Discoveries of 1861

Sewing Machine Improvements

Beet-Root Cultivation and Sugar

Paraffine

Good Inventions Lost to the Country--Importance of Encouraging Inventors--What Congress Should Do

Extension of Patents--For Whose Benefit They Are Granted

Cast-Iron Moldings

Operations at the Brooklyn Navy Yard

Clothes Wringers

British Patent Law Reform

New-York Railways

Recent Foreign Inventions and Discoveries

Patent Claims

Recent American Inventions

To Our Readers

Submarine Guns

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    Correspondence

  • Notes and Queries

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May 17, 1862

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