The Defenses of Constantinople
Ample Preparations That Have Been Made by Turkey to Resist Invasion
Volume 80, Issue 2061supp
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Features
Necessity for Mine Operators to Know the Ash Values of their Coal
Volatile Matter, Fixed Carbon and Sulphur in Coal
A New Type of Aeroplane
An “Even Keel” Flyer Embodying Many Original Features
German War-Driven Scientific Progress
Tetanus Serum for the French Army
Photo-Electricity—I
The Intimate Relations of Light and Electricity
Kilns for Lime Burning
Problems of Geographical Influence
Physiological and Psychical Influences That Are Affected by Environment
Italy and Engineering
Sugar Beet Cultivation in England
Machining Shrapnel Shells
Many Accurate Operations Necessary to Produce a Perfect Projectile
Labor Statistics of Coal Mining
The Manufacture of Condensed Milk, Casein, Etc.—I
Discussion of Methods of Analyses