Feature

Propellers Used as Brakes on Navy’s Largest Blimp

Temperature in Engines Measured by Magnet Ratio

Chemical Industry Medal Presented to Col. Dewey

Airborne Lifeboats

Sulfa for Gas Gangrene

[Photograph]: Rescue

Male Brain Becomes Female through Chemical Change

In Science Fields

Autumnal Equinox

Guggenheim Fellowships

Polio Cases This Year Are Highest since 1927

New P-63 Kingcobra