Feature

U. S. A. a “Safety Island” for Important Animals

First Glances at New Books

Front Matter

Potential Health Menace in New Yellow Fever Mosquito

National Zoological Park Has White Bison Bull

Vitamins from A to Z Are Fact, Not Fancy

Telescope Mounting Awaits Assembly at Mt. Palomar

Scientific Facts Now Are Presented in Picture Form

Increase of Taxes May Bring Communism without Revolt

Dura on the Euphrates Called Great Deposit of Ruins

Rifle Gives Man on Foot a Break against Planes

Better Hurricanes Are New Trick of Motion Pictures