Feature

Winter Weather Record

High Accuracy Probe Measures Radioactivity

Early Detection of Polyps Can Reduce Cancer Rate

Explorer III Placed in Orbit Successfully

Substance Aids Body’s Use of Vitamins, Iron

Reproduce Star’s Heat

[Illustration]: Instrumentation for IGY Satellite

[Photograph]: Aphid-Resistant Alfalfa

Front Matter

In Science Fields

Thermo-Electron Engine Holds Great Promise

New Machines and Gadgets