Feature

How to Have a Good Time Is Adolescents’ Chief Worry

Explorer Finds New River in Jungle of Brazil

Nature Ramblings: Mountain Aristocrat

First Glances at New Books

Breathing of Living Tissue Is Disturbed by X-Rays

Difference in Brightness Is Biggest Auto Light Problem

Science Internationalism Aided by “Scientific Immigrants”

Original Greek Read to Infant in Lengthy Test of Memory

Will the Great Shower Return?

Octane Rating of Gasoline Not Wholly Dependable

Front Matter

British to Attack Mt. Everest from Ground and Air