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Features

The Problem of the Method of Evolution—I

Observed Changes in Hereditary Characters in Relation to Evolution

By H. S. Jennings

Ancient Defensive Armor in Modern Warfare

The Shield, the Cuirass and the Helmet Revived

By Nicholas Flamel

Notes on Welding Systems

War Psycho-Neurosis—II

The Psychology of Soldiers' Dreams

By F. W. Mott

Films of Metals and Salts in Glow Lamps

Oysters: The Food that has not “Gone Up”

A Little of their History and their Habits of Life

By H. F. Moore

Ancient Saxon Remains

Gas Firing and the Glass Industry

Stammering and the Evidence of its Inheritance

By Ernest Tompkins

Head Resistance of Airplanes

High Temperature Development of Roll-Film, Film-Plates, and Papers

The Fourth Dimension

The Engineer's Playground

By R. Fleming

The Gas Attack and Liquid Fire in Modern Warfare

The Treatment of Severe Burns with Ambrine

A New and Radical Treatment of Great Promise

By Charles G. McMullen

Kerguelen Island as an Antarctic Reserve

Potato “Butter”

Action of Iodine on Alkalies

Stellar Dynamics and Statistical Mechanics

Effects of Furnace Conditions on Basic Refractories used in Smelting Operations

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March 23, 1918

Think Outside the Gift Box