The Physiological Rôle of Calcium in Plants
A Problem of Great Importance in Agriculture
Features
The Thickness of the Atmosphere of Jupiter
Using the Bark of Trees
The Jacoons
An Aboriginal Tribe of the Malay Peninsula
Modern Ideas of Cosmogony
A Review of the Most Important Hypotheses
Astronomy and the End of the War
Agar-Agar in Treating War Wounds
Standard Flour and Bread in Europe
The Marseilles-Rhone Canal
The Shortage of Ships
What is Being Done in America to Meet the Situation
Examination of Artificial Leather and Leather Substitutes
Prehistoric Ruins of the Mesa Verde National Park
Cavitation
A Study of the Screw Propeller
Silent Warfare
Devices for Reducing Noise and Flash of Guns
Melting Copper Nickel Alloy by Gas
Combustion of Gasoline
Precision in Chemical Weighing—II
Notes on the Apparatus To Be Employed and Methods of Using it
Chemical Control in the Leather Industry
A Discussion of Past and Present Aspects of this Branch of Industrial Chemistry
Large Aeroplanes
Advantages of Increased Size
