Feature

People’s Observatory Dedicated in Pittsburgh

Four Christmas Stars

Film Shows Sun Tornado Big Enough to Cover U. S.

Eye Injuries in U. S. Total 1,000 a Day

New Machines and Gadgets

High Flying Airplanes Are Made Safe by Tests

Not One Stratosphere, but Two, Says Scientist

In Science Fields

Vitamin C May Improve Treatment of Syphilis

[Photograph]: Flying Ship

In Science Fields

Low Boundary of Stratosphere May Shift up and Down