Feature

High Test Gasoline May Cause Disease

Horse “Sleeping Sickness” Breaks Old Boundaries

[Photograph]: Test of a Gun Is in the Shooting

Warn against Substituting Cadmium for Tin in Trays

Infantile Paralysis Virus May Enter Body through Mouth

[Photograph]: For Physicians

New Government Office for Defense Scientific Work

[Photograph]: Transparent

Hormone Production by Thyroid Gland Clocked

First Glances at New Books

Front Matter

Hayfever Cause Extracted from Ragweed Pollen