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Features

Dr. Normandy's Improved Fresh Water Apparatus

Area and Population of the British Empire in Detail

Shipping of the United States

Size and Population of the Principal Countries

The Shipping of the British Empire

American Basket Willow

Rule for Measuring Ships

Journal of Patent Law

Linseed Oils

Steel Wire for Telegraphs

The Force of a Re-Issued Patent

An Improved Fishing Rod Wanted

Fire-Escape Hook and Ladder Truck

The Japanese Steamer

Check Valves

Cooking by the Sun's Rays

By Joseph Henry

Heard's Moth Trap

Historical Society in New Mexico

Water Gas

The Obstruction to the Navigation of Rivers Caused by the Piers of Bridges

By J. W. Sprague

A Column of Varieties

Polytechnic Association of the American Institute

Engraving on Glass

Improved Gas Apparatus

Warker's Apparatus for Impregnating Liquors with Carbonic Acid Gas

Editorial Correspondence - April 21, 1860

The Growth of Our Shipping

Weekly Summary of Inventions

Foreign News and Markets - April 21, 1860

Industry--Manufactures--Commerce

The Patent Bill--Morse's Extension Case

Patent Claims - April 21, 1860

Issued from the United States Patent Office

Runkel's Oscillating Piston Engine

A Model Subscriber

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    Notes and Queries - April 21, 1860

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April 21, 1860

Help Us Reforest the Mississippi River Valley