Feature

World Population Quadrupled within Three Centuries

Front Matter

Women Quicker but Men Better at Prolonged Thought

Thunderstorms Located by Radio and Oscillograph

First Glances at New Books

February Evening Skies

[Photograph]: Still Bearing Tribute

Foundations Alter Support of Researches

Nature Ramblings: A Leafless Evergreen

Three Million Volts Hurled by New Compact Machine

Dark Nebulae: “A Classic of Science”

Superlative Splendor Revealed by Excavations in Persia