Feature

Books of the Week

New Machines and Gadgets

Nature Ramblings: Floating Zoo

Front Matter

General Relativity Tested

[Photograph]: Land-Based Radar

Resistors Made on Glass with Sputtering Method

Predict Increased Use of Gas-Filled Transformers

Explorer VII Measures Earth’s, Sun’s Radiation

New Drug Reported to Relieve Heart Pain

Name Nobel Winners

X-Ray Recording Device Gives Fast TV Picture