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Features

Tooth Powders

Improvement in Oscillating Engines

List of Patent Claims

Mine of Alum

Test for Mercury

Kiln Drying by Dry Steam

The Proposed Change in the Patent Laws

The New Law of Patents

Agricultural Fairs.--Programme for 1856

New Corn Planter

Gold Extracting Machinery

Great Old and New Ships

Flavoring Matters

Recent American Patents

A Great Chance for Inventors

Value of Patents

The Oceanic Survey

Scientific Explorations

Resuscitation of Drowned Persons

Notes on Patented Inventions.--No. 13

India Rubber Manufactures

Great Trial of Mowing Machines

The Philadelphia Mint

The Consumption of Ice

To Correspondents

Important to Inventors

Important Items

New Galvanic Battery

Raising a Safe from a Sunken Steamboat

The Annual Amount of Heat

Atmospheric Impurity and Disease

For What Purpose were Plants Created

Mechanics

Departments

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    July 12, 1856

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