Feature

New Type of Prehistoric Pottery Found in Mexico

First Glances at New Books

In Science Fields

Front Matter

Reorganization Threatens Occupational Testing Clinic

One Treatment Replaces Three for Diphtheria Protection

Exercise Good for Teeth Theory Seems Contradicted

They Are Certainly Dog Days and This Explains the Name

Philadelphia to See Stars Shining from Sheet Metal Sky

The Barbed Wire Fence: “A Classic Invention”

Insanity Gives Release from Hard Life

New Type of Silicosis Found in Wales