Feature

Seek More Evidence That Man Knew Extinct Animals

Dust Avalanche Falls on London

In Science Fields

Making a Bigger Telescope

Welfare of American Youth Motive of Conference

Researches Assisted by National Research Council

Remains of Ancient Tribe Found in Western Mexico

Nature Ramblings: Grosbeak

First Glances at New Books

Front Matter

Tests on College Girls Show Minute Virus Causes Colds

[Photograph]: The Size of the Huge Dornier DO-X