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Features

Contrast and Admixture of Colors

Improvement in Hot-Air Engines

Practical Suggestions on Tanning Leather

The Advantages of Quick-Liming

By C. Gilpin

How Golden Hair is Obtained

Ambergris

Explosive Compounds for Engineering Purposes

Farmer's Hand Dumping Barrow

International Trial of Reaping Machines

Beet Root Sugar

Gravitation the Origin of the Heat of the Sun

Cultivation of the Poppy and Manufacture of Opium

Shafting, Pulleys, and Belts

The Heating of Buildings

An Important Office to Fill

The Pacific Railway Imbroglio

The Patent Office Before Congress Again

Persons Unfitted for the Commissionership

Skinning and Stuffing Birds

Protoplasm

Why Don't Boys Learn Trades?—Mechanical Labor

Springs, Their Power and Uses

New Publications

Velocipede Patents

Velocipede Notes

Editorial Summary

Recent American and Foreign Patents

Manufacturing, Mining, and Railroad Items

Official List of Patents

Issued by the United States Patent Office

European Patents

Patent Offices

Departments

  • Departments

    Answers to Correspondence

  • Business and Personal

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The Essential Guide to the Modern World

The Essential Guide to the Modern World