Feature

First Glances at New Books

Nature Ramblings: Ancestral Insect

Back Matter

Volume Information

Astronomers Told of Comet’s Wandering

Dr. H. F. Osborn Head of American Association

Evolution on New Phase

Evolution Reaffirmed

Psychologists Told How Monkeys Judge Time

X-Rays Change Heredity

New X-Ray Property

X-Rays from Gases