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Features

Contrast and Admixture of Colors

Improvement in Hot-Air Engines

How Golden Hair is Obtained

Practical Suggestions on Tanning Leather

The Advantages of Quick-Liming

By C. Gilpin

Ambergris

Explosive Compounds for Engineering Purposes

International Trial of Reaping Machines

Farmer's Hand Dumping Barrow

Beet Root Sugar

Gravitation the Origin of the Heat of the Sun

Shafting, Pulleys, and Belts

Cultivation of the Poppy and Manufacture of Opium

An Important Office to Fill

Persons Unfitted for the Commissionership

The Heating of Buildings

The Pacific Railway Imbroglio

The Patent Office Before Congress Again

Skinning and Stuffing Birds

Springs, Their Power and Uses

Why Don't Boys Learn Trades?—Mechanical Labor

Protoplasm

Velocipede Notes

Velocipede Patents

Editorial Summary

New Publications

Manufacturing, Mining, and Railroad Items

Recent American and Foreign Patents

Official List of Patents

Issued by the United States Patent Office

Patent Offices

European Patents

Departments

  • Departments

    Answers to Correspondence

  • Business and Personal

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