Feature

Anticoagulants May Fail

Treatment of Strokes Tough Medical Problem

U. S. Satellite Tested

Better Rockets Seen

In Science Fields

Scientific Gifts for Christmas

Books of the Week

Sputnik Rocket Falls to Earth

New Machines and Gadgets

Nature Ramblings: Birdman’s Bible

Long Use of Some Drugs May Cause Body Damage

Report Clue to Leukemia