Heredity—II
New Theories and Facts Relating to the History of Organic Beings
Volume 78, Issue 2020supp
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Features
Production of High Vacua by means of Finely Divided Copper
Ozone in the Upper Atmosphere
A New Application of Roentgen Rays
An Infallible Means for Identifying Oil Paintings
New Light on Ancient Egypt
Iron Shielded from Earth's Magnetism
Tractor Biplanes for the United States Army
Conditions Governing a Contest to be Held at the Signal Corps Aviation School at San Diego, California, on or about October 15, 1914
The Pinnacle of the Canadian Alps
The Opening of a New American Scientific Storehouse
American Opportunity in a World Catastrophe
Will We Profit by Past History?
A Fossil Human Skeleton from German East Africa
Activity of Freshly Formed Radium Emanation
Marine Birds and Hydro-Aeroplanes
A Number of Folding Go-cart Patents.—
A Motor Hospital
The Latest French Military Vehicle
Late Types of Aero Engines
Wireless Communication and Aeronautics
Facts Relating to Light Portable Apparatus
European Field Artillery
A Discussion of Belgian, German, and French Guns