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Features

Improved Planing Machine, Dangers of Benzine in Varnish Making

Saving Ten Per Cent of Flour

Notes on Military and Naval Affairs

History of Turbine Water Wheels

The Ancient Savages of Europe

A Splendid Specimen of California Workmanship--Hansbrow's Pump

Too Heavy Shot for Light Guns

Plumbing and Soldering Lead Pipe

Monier's Gas Burner

What Can Be Done for Inventors--Advice Gratis and Advice for Pay

Jealousy Between the Army and Navy

Our Navy--Who is to Blame?

The United States and Canadian Reciprocity--Patent Laws

Artillery Matches and Signals

Steam Rams and Their Qualities

Excitement on Hose Couplings

New Steam Floating Battery

The Navy Department and Iron-Clad War Steamers

Our Navy a Year Ago

California Statistics and Progress

Can Guncotton Be Used for Army Purposes ?

Harbor Defences

Armstrong Guns on the Merrimac

Subjects for Inventions

Recent American Inventions

Patent Claims

Issued from the United States Patent Office

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    Notes and Queries

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March 29, 1862

Beyond XX and XY

Biology. Identity. Equality.