Feature

Transplanted Animal Hearts Keep Beating for Months

How Do We Hear?

Rare Meteor Spectrum Obtained by Astronomer

Relief for Angina Pectoris, “Most Painful” Disease

Front Matter

One of Birth’s Mysteries Solved by Hormone Study

Cosmic Rays Promise to Test Needed Super-Einstein Theory

Back Matter

Improved Method of Chromium Plating Reported

Experimental Cornerstone of Einstein’s Theory Checked

First Glances at New Books

$1,000,000,000 in Gold to Come from Earth Yearly