Feature

Valuable Tung Oil Industry Now Developing in America

Chemical Nature of Vitamin C Explained

Nature Ramblings: “Thousand-Leggers”

Stop-Watch Proves Snakes Never Travel at High Speed

Thyroid Gland Activated by Pituitary Gland

First Glances at New Books

Front Matter

Super-Sensitivity of New Research Tool Is Confirmed

Camera Reveals Mountain Not Seen by Aviator

Opiates Found Related to Essential Elements of Diet

New Method May Result in Cheap Supply of Ramie

Castor Oil Yields Drug That “Unpoisons” Cobra Venom