Feature

[Photograph]: Open Sesame on a Giant Scale

Science Advances in 1938

Geologic Santa Claus Comes up Earth’s Great Chimneys

Photos of Sun and Moon Make Ceiling Decorations

Chemical Society Asks News of Any Suppressed Patents

Pyorrhea Greatest Problem Facing Dentists Today

Mariners May Have to Depend on Foreign Charts

[Photograph]: A Gallacker

[Photograph]: Xerophyte Meets Xerophyte

Steel Industry Keeps Young through Research

Wrong to Use Darwin’s Ideas to Justify Aggression

First Glances at New Books