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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

Forming Cement Drains

How to Cut a Bevel for a Hopper

Trial of Warlike Inventions

Death of Samuel Colt, the Inventor

The Defense of our Harbor--Prompt Action Needed

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

Patent-Office Illustrations

The Bottle Law Unconstitutional

Water as a Disinfectant

Military Training in Common Schools

The Chemistry of Coal

Resignation of the Secretary of War

Rise in the Price of Cotton Goods

Recent American Inventions

Notes on Foreign Inventions and Discoveries

Patent Claims

Issued from the United States Patent Office

To Our Readers

Piston Packing for Pumps

The Construction of Chimneys


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