Feature

Front Matter

First Glances at New Books

Prehistoric Cave Culture Proves Mystery to Scientists

[Photograph]: Three Generations of Bridges

In Science Fields

Huge Burning Glass May Give Maximum Sun Heat on Earth

Navy’s New Airship Hangar Will Be Built in Sections

Special Capillaries Protect Extremities against Frostbite

Insects Better than Rats for Use in Vitamin Tests

New Theory Would Explain Cosmos’ Unexpected Ways

Swinging Children by Arms May Be Cause of Paralysis

Heredity in Mental Disease Urged for Study in Country