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Features

Atoms and Ions—II

A Comprehensive Discussion Especially as Related to Gases

By J. J. Thomson

The Scientific Work of Prof. J. C. Bose

By Jakob Kunz

The Sterilization of Water-Supplies for Troops on Active Service

By G. Sims Woodhead

The Scientist and the Athlete

The Physiological Laboratory of the French Military School at Joinville

By Jacques Boyer

Gas and Steam Engines and the Turbine

Cost of Operation, Investment and Depreciation at Blast Furnaces and Steel Works

By J. E. Johnson

Salt and its Relation to Nutrition

The Submarine in Naval Warfare—I

Problems of Design, Construction and Recent Tactical Developments

By R. H. M. Robinson

The Super-Dreadnought

The Indicating and Recording of Time

Electro-Percussive Welding

Recognizing Vocations from the Teeth

A Phase of Occupational Diseases that Has Received Little Attention

Relics from the Second Grinnell Expedition

Italian Military Aeroplanes

Interesting Types of Craft for Air and Water

By John Jay Ide

Copper Cyanide Plating Solutions

Valuable Facts Relating to Their Composition, Action and Results

By Max C. Weber

The Formation of Ozone in the Upper Atmosphere—II

And Its Influence on the Optical Properties of the Sky

By J. N. Pring

High-speed Bullets and Dumdums

National Standard Hose Couplings and Fittings for Public Fire Service

Departments

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    May 08, 1915

    Think Outside the Gift Box