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The Variations of Present Day Glaciers

A Discussion of Theories Relating to their Mechanism and Movement

By P. L. Mercanton

Spuds by the Million

What Florida Farmers are Doing to Prevent a Potato Famine

The Dakin or Carrel-Dakin Solution

Spitzbergen and its Resources

The Aurora Borealis

The Problem of the Method of Evolution—II

Observed Changes in Hereditary Characters in Relation to Evolution

By H.S. Jennings

Una-Flow Steam Engines

Protector against Hail of Marcillac at Chenavari (Ardeche)

Standard Engineering Symbols

Sulphur in Hypodermic Injections

The Flora of the Somme Battlefield

Army Kitchens

Use of Lime in Bread-Making

A New Food Chart

Age-Societies of the Plains Indians

By Robert H. Lowie

Antiseptics

Work done for the British Medical Research Committee in the Pathological Department, Edinburgh University

By Theodore Rettie

Revenue by Thawing Frozen Water Pipes

Some needed Reforms in Commercial Enlarging Lanterns

A Glass Polarimeter

A Simple Instrument for Illustrating the Laws of Optical Rotation

By G. A. Shook and C. V. Kent

Recovery of Light Oils from Coke-Oven Gas

Two Ancient Bronzes

The Oldest Flint Implements

A Study of the Methods by Which They Were Produced

By J. Reid Moir

War time Diet and Health

By Percy G. Stiles

The Sikhs—I

A Sect that Became a Nation

By Sirdar Daljit Singh

A Substitute for Celluloid

Action of Hydrogen Peroxide on the Neutral Salts of Lead

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    March 30, 1918

    Complex Causes. Alternative Solutions.