Feature

Hayfever Cause Extracted from Ragweed Pollen

Three Inches of Safety Glass Shields Fliers from Bullets

First-Aid Information against War Gases

[Photograph]: For Physicians

In Science Fields

Any Life on Venus Is Declared Impossible

Syphilis Rate in Draft One-Seventh That in 1917

Synthetic Starch Made by Enzyme Acting on Glucose

Water

Front Matter

New Process Purifies Aluminum from Alunite

Great Amphitheater Carved out of Mountain