Feature

[Illustration]: Earth’s Shadow on Moon

Giant Propellers Being Made from Wood and Plastics

Night-Blooming Cereus Opening Is an “Event”

New Books on Science

[Photograph]: Flying Fortress

Find New Earthquake Wave May Aid Detection of Enemy

Influenza Epidemics Are Predicted for 1940 and 1941

[Photograph]: Cold Light

[Photograph]: Rutherford of Nelson

Front Matter

Vitamins Replace Narcotics in New Treatment of Insomnia

Europe’s Map Changes Complicate Census Plans