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Features

Radial Drilling Machine, Human Degeneracy, and more

Salt-Cake in Dyeing

Manganese--Its Useful Applications in the Arts

By L. Feuchtwanger

Notes on the Velocipede

Something New in Steel

How to Construct a Toy Steam Engine

Water Power of the Connecticut--The Holyoke Dam

Faint's Patent Stovepipe Joint

Obituary--Death of a Naturalist

Central Lake Navigation

Obstacles in the Way of the Success of Inventors

Is Labor-Saving Machinery the Enemy of Labor?

Does American Industry Need Protection?

Kerosene Oil--Report of Prof. Chandler to the Metropolitan Board of Health

Primeval Chemistry--Lecture by Professor J. Sterry Hunt

Recent American and Foreign Patents

Editorial Summary

Official List of Patents

Issued by the United States Patent Office

European Patents

Patent Offices

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis