Feature

First Glances at New Books

Two Weeks’ Delay Precedes X-Ray Sterility in Mice

Engineers Plan Program of Movie Standardization

Better Trees Being Bred for Future Forest Crops

Larger Families May Again Become Fashionable

September Evening Skies

X-Rays Can Speed up and Reverse Evolution

Front Matter

Indian Drum Religion Is Thriving American Cult

New Race of Fossil Men Found in North Africa

Nature Ramblings: Lovers of Open Fields

Science Explains Hang-over after Alcoholic Debauch