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Features

Some High-Pressure Phenomena

Latter Day Experiments that have thrown new Light on Physical Problems

Brittleness in Pure Iron

German Sources of Nitrates

A Garden Terrace Theater on a College Campus

Annatto of Commerce

By C. D. Mell

Standard Highway Bridges

Phosphorescent Zinc Sulphide

Sands for Glass Making

With Especial Reference to Optical Glass

By P. G. H. Boswell

A War-Time Sales Argument

Magneto-Ionization

Safeguarding the People's Food

River Sanctity and the Engineer

A Motor Ambulance Driver's Notes from the Front

Used Cartridge Cases

Migration of Projectiles in the Blood Stream

The Occurrence in Virginia of Green-Gilled Oysters

Similar to Those of Marennes

By Philip H. Mitchell and Raymond L. Barney

Skin Friction Resistance of Ships

And our useful Knowledge of the Subject

By G. S. Baker

Removal of Nicotine from Tobacco Smoke

Hardness and Hardening

An important property not yet Satisfactorily Deliminated

By T. Turner

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November 17, 1917

Think Outside the Gift Box