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Unloading Bananas by Machinery

New Methods of Handling Delicate Fruit Rapidly and without Injury

A Record of Achievement—I

The Contribution of the Chemist to the Industrial Development of the United States

By Bernhard C. Hesse

Tincture of White Soap

Sherardizing for Rust-Proofing Metals

The Process, the Apparatus and Methods Employed

By Chester L. Lucas

London Traffic Dangers

The Zeppelin Question

Facts and Figures Indicating the Number and Capacity of the Air Fleet

Some Questions of Evolution

The Present Position of Natural Selection Considered

Influence of Radio-Active Earth on Plant Growth—I

Facts Indicated by Practical Experiments

By H. H. Rusby

Fuel Oil in the Navy

A Handy Foundry Cupola

Effect of Climate on Location of Manufacturing Plants

An Important Factor that Often Determines Economic Success

By William M. Booth

Photographing Projectiles—II

Means of Illumination from Electric Sparks

The Harmful Constituents of Roasted Coffee (Coffee-Toxin)

The New Knowledge of Coal Tar

Scientific Methods for Utilizing the Products of Coal

By Horace C. Porter

Bread from Stones

New Books, Etc.


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