Feature

Social Inventions Are Needed to Keep Pace with Science

Rabbit and Rat Embryos Are Grown in Laboratory

Nature Ramblings: Sea-Cows

Millikan and Compton Debate Cosmic Ray Facts and Theories

Growth of Plants Stimulated by Proper X-Ray Treatment

Towns Change Water Supply to Prevent Tooth Defects

In Science Fields

Atom Building Keeps Stars Shining, Says A.A.A.S. Head

Dr. Eyring Explains Winning Accomplishment

Artificial Feeding Keeps up Weight of New-Born Babies

Front Matter

Discovery Doubles Number of Known Be-Type Stars