Feature

Dr. H. F. Osborn Head of American Association

Volume Information

First Glances at New Books

Astronomers Told of Comet’s Wandering

Back Matter

Trees Contain Air

Europe’s War on Insects

Nature Ramblings: Geranium

Coating Helps Electrons

X-Rays Change Heredity

Study of Quake Risk Urged

Dog Star Has Many Claims to Fame