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The Synthesis of Ammonia from its Elements—I

The Commercial Exploitation of the Earth's Atmosphere

By H. A. Bernthsen

The Healing Virtue of Light

The Medical Art of Chromotherapy

Artificial Silks

Stone Records of the History of New Mexico

The Rock Hewn Story of Early Spanish Occupation

By Carl Hawes Butman

Scientific Incendiarism

Ingenuity Applied to Evil Purposes

Geared Turbines

Their Development for Ship Propulsion

By George Westinghouse

Crystal Structure Revealed by Röntgen Rays

A Glimpse of the Molecular Architecture of Solids

By B. E. H. Tutton

Steel Cast Locomotive Frames

The Importance of Heat Treatment—High Carbon, Vanadium and Nickel Castings Considered

By Edwin F. Cone

Why do Business Men Fail?

By W. C. Holman

The Becquerel Memorial Lecture of the Chemical Society

Sir Oliver Lodge Reviews' the Field Opened by the French Physicist

Plant Food in Relation to Soil Fertility

The Problem of Restoring American Soil and Maintaining Prosperity

By Cyril G. Hopkins

Fire Hazards in Rubber Manufacture

By L. Alexander Mack

The Westport Disaster

Report of the Connecticut Public Utilities Commission

The Death-Rate of Earthquakes

Of All Catastrophes the Most Deadly

By Charles Davison

Long Lived Locomotive Engineers

Recent Experimental Study of Reflex Action

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    Scientific American Supplements Volume 74, Issue 1929supp

    Think Outside the Gift Box