Feature

Spine Jack Operation

Herb Medicine Analyzed

Placebos Really Help

Wool Radioactivity Very Slight and Not Alarming

Atomic-Powered Buoy Now Sending Signals

Research Offers Hope for Heart, Cancer Ills

Most Destructive Quake in More than a Year

New Ideas and Gadgets

Nature Ramblings: Ruby-Throated Hummingbird

Front Matter

Probe Billions of Years

[Photograph]: Noise Breaker