Feature

Moon Hoax, Newspaper Prank, Now Just a Century Old

Canal System Studied in New Hydraulic Laboratory

Public Health Workers Plan Campaign on Mental Diseases

New Blood Test Reveals Approach of Lead Poisoning

Questions the Value of Care before Childbirth

Front Matter

Disease Hazards of Africa Also Menace United States

First Glances at New Books

Crop Control of the Future Will Strive for Increase

Scientist Braves Desert to Study 200 Extinct Volcanoes

Victory over Two Plagues Is Reported from Sweden

Value of Infantile Paralysis Vaccine Held Doubtful