Feature

Nature Ramblings: Plankton

Marginal Indians of South Don’t Miss Civilization

First Glances at New Books

Front Matter

New Government Office for Defense Scientific Work

[Photograph]: Transparent

Hormone Production by Thyroid Gland Clocked

Infantile Paralysis Virus May Enter Body through Mouth

Different Time Intervals Distinguished by Rats

Weather Bureau Services Cost Each U.S. Citizen Five Cents

[Photograph]: View Finder

Girls’ Experience Shows Hitch-Hiking Reasonably Safe