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Features

Interborough Rapid Transit Company Test of Subway Engines

A Cheap and Simple Compensation Pendulum

The use of Alcohol as Fuel for Internal-Combustion Motors

Benjamin Franklin and Electricity

Efficiencies

By James Swinburne

Single-Phase Alternating-Current Railway Work

By Lionel Calisch

The Physics of Ore Flotation

By J. Swinburne and G. Rudorf

A Hand Camera Capable of Conversion into an Enlarging and Projecting Apparatus

How Brilliant Metallic Surfaces are Formed on Pottery

A Miniature Caloric Engine

The Fixation of Atmospheric Nitrogen

A New Standard of Light

The Changes in the Nerve and Muscle which Seem to Underlie the Electrotonic Effects of the Galvanic Current

By Jacques Loeb

A Novel Method of Determining the Elements of the Earth's Orbit

Our Berlin Correspondent

Methods of Transportation among Insects

Principles of Success in Concrete Block Manufacture

By Louis H. Gibson

The Degree of Accuracy that can be Obtained in Measurement

Use of Diamonds in the Industries

Diamond Tools

By George F. Kunz

Electrical Notes

Engineering Notes

Trade Notes and Formulæ

Departments

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    February 24, 1906

    Think Outside the Gift Box