Feature

New Earthquake Indicator Records at Distance

International Aviation Aided by New Standards

VHF Radio for Small Planes Transmits in Bad Weather

New Machines and Gadgets

Front Matter

New Test for Hookworm

China Has National Park

Change in Fluid Balance May Kill Malaria Victims

Better than Morphine

Afterburner Adds Speed

German Magnetic Alloy Now Made in America

Hope for Amputees