Feature

New Evolutionary Ladder Outlined for Man’s Ascent

Small Telescopes Reveal Comet Just Reported

Typhoid Carriers Made Safe by Gall-Bladder Removal

In Science Fields

History Pushed Back in America and Asia

Grafted Nerves Restore Normal Facial Expression

“Positron” Confirmed as New Particle of Matter

Two Elements Have Atomic Weights Changed

Front Matter

First Glances at New Books

Death Valley Becomes National Monument

Cancer Cell Distinguished by Size of Nucleus