Feature

Patents of the Week

U. S. Food Safe from DDT

‘Big Breakthrough’ Seen in Birth Control Action

Talking Typewriter Teaches Tots and Blind

U.S. Seen Ahead in Using Scientists in Government

Names and Credit Worry Scientists and Journals

Nature Note

New Ideas and Gadgets

Doctors Are Reading

Front Matter

Charting by ‘Blinks’

Debate Origin of Craters