Feature

Research Laboratories Announce Useful Finds

Use Flickering Beam to Probe Upper Atmosphere

Nature Ramblings: Versatile Rhus

Propaganda Need Not Lie; May Succeed with Part Truths

Fossil Found in Colorado 50 Million Years Old

First Glances at New Books

Front Matter

Metrazol Treatments Cure by “New Deal of Nerve Ends”

[Photograph]: X-Ray Heart Beat

Propaganda Balloons Used in World War, Too

New Gas-Oil Explosives Would Help U. S. in War

Two-Way Facsimile Unit Developed for Aviation