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Improvement in Breech-Loading Rifles, The Devotion of Agassiz to Science

Notes on Military and Naval Affairs

Surface Condensers for Steam Engines

Combination Mop Scrubber

How to Cut a Bevel for a Hopper

Forming Cement Drains

The Defense of our Harbor--Prompt Action Needed

Death of Samuel Colt, the Inventor

Trial of Warlike Inventions

Resignation of the Secretary of War

Patent-Office Illustrations

Military Training in Common Schools

Learning to Shoot--Wesson's Breech-Loading Rifle

Water as a Disinfectant

Rise in the Price of Cotton Goods

The Bottle Law Unconstitutional

The Chemistry of Coal

Notes on Foreign Inventions and Discoveries

Recent American Inventions

Patent Claims

Issued from the United States Patent Office

To Our Readers

The Construction of Chimneys

Piston Packing for Pumps


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January 25, 1862

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