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The Pleistocene Man of Vero, Florida

A Summary of the Evidence of Man's Antiquity in the New World

By F. H. Sterns

Some Reactions of Acetylene

By W. R. Hodgkinson


Tree Planting to Control Snow and Wind

Protection for the Farmer and the Railroad

By W. C. Palmer

The Present Position of Metamorphism

A New British Oil Industry

Cost of Producing Calcium Carbide

Problems of Atomic Structure—V

Differences Characteristic of Different Elements, and Mechanism of the Molecule

By J. J. Thomson

The Hadfield Prize

For a New Method of Determining the Hardness of Metals


Gathering Kauri Gum in New Zealand

A Little Known but Important Industry

By Harold J. Shepstone

Vitamines in War-Time Diets

Mineral Wealth of Alsace-Lorraine

Long Range Artillery Calculation

By George Greenhill

Mineral Riches of the Far East

Proper Storage Conditions for Potatoes

A Miracle Explained

Remarks on the Temperature of Space

By Ch. Fabry

The Pyranometer

An Instrument for Measuring Sky Radiation

By C. G. Abbot and L. B. Aldrich

Detecting Organic Impurities in Sands

The Electroculture of Crops

A Review of Important Experiments in Plant Physiology

By Ingvar Jorgensen and Walter Stiles

High Flying in Modern Aeroplanes

The Standardized Infant


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