Feature

Strain of Machine Age Life Causes Increase in Mental Ills

Rocks of the Fortieth Parallel: “A Classic of Science”

The Earth Is a Soup-Kettle

New-Found Sex Hormone Relieves Migraine Headaches

Brain Makes Fuel of Alcohol, Yale Researchers Discover

Few People Have Pure Blue Eyes

Cover Picture Pursued over New England Hills

Front Matter

Engineers Plan Program of Movie Standardization

New Race of Fossil Men Found in North Africa

Better Trees Being Bred for Future Forest Crops

Nature Ramblings: Lovers of Open Fields