Feature

New Museum Exhibits Teach Conservation

1938 Birth Rate up, Death Rate Is Down

Early Crop Improvement Held Mostly Unconscious

Fossil Bones May Belong to Kin of Java Ape Man

America Was News to Sixteenth Century China

Magnetic Forces Aid Swedish Traffic Control

Siberia’s Frozen Ground Is Survival of Ice Age

Limits of Universe Still beyond Astronomers’ Reach

In Science Fields

Eclipsing Star

High-Speed Electrons Create Strange Glow

44 Gases Used in World War; New Ones Promised for Next