Feature

Early Primate Fossils Collected in Northwest

New Type of Speed-Boat Patented by Gar Wood

Scientist Describes Visit to Unknown Island in the Sky

Nature Ramblings: -Ptera

Cuba Land Snails Travel on Wings of Hurricane “Air Line”

Caring for Child after Infantile Paralysis

Super-Voltage X-Ray Doses Can Now Be Standardized

Battling a Plague

First Glances at New Books

Five Diseases Are Targets in Fight for Nation’s Health

How Documentation Promotes Intellectual World Progress

Front Matter