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Features

The Islands of the Pacific

Their Present State and Future Importance

By Everard im Thurn

A World Language

“Ersatz” Fatal to Wild Animals

Canyon de Chelly of Arizona

A Monument of Pre-Historic America

Coke Formation

Concrete Ships Not Efficient Carriers

Paper-Making from Megass

How Plants and Animals Utilize Color

Pigments that Protect Living Matter against Radiation

Increasing Pressure by means of Electrolysis

Industrial Waste Products—Methods of Reclamation

Theory and Practice of Disinfection by Alcohol

Carbide Formation and Stability

Fishing by Machinery

How Salmon are Caught on our North-West Coast

Exposure Meters

Vermiform Appendix in the Wombat

Work Done by 1,500,000 Horses in France during the War

The Mentality of the War Prisoner

Hot Wire Anemometry

Its Principles and Applications

By J. S. G. Thomas

Electric Heater for use in the Analytical Distillation of Gasoline

Telescopic Eyepieces

Mortality Due to Snakes and Wild Animals in India

Sulphate of Copper Process

The Detection of “Ghosts” in Prisms—II

A Method of Developing Prisms Free from Undesirable Reflections

By T. Smith

Photo-Chemical Reactions in Photography

Conservation of Men on our Railroads

Notes on Kite Flying

For Meteorological Observations

By Vincent E. Jakl

Removing Temper from Hardened Steel

Production of Metallic Coatings

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