Feature

First Birthday Reported for Only Known Chimpanzee Twins

Front Matter

Danger of Snakebite Is Greater than Supposed

First Glances at New Books

California Wells May Give 1,000 Tons of Dry Ice a Day

Cod Liver Oil Injures Heart and Muscle of Farm Animals

In Science Fields

Zeppelin Models Whirled at 200 Miles per Hour in Tests

Sinking of Earth’s Crust near Boulder Dam Expected

A Skyrocket Scourge

Brief Treatment in Clinic Improves Mental Patients

Pressure of Population Cited as Cause of Erosion