Feature

One Treatment Replaces Three for Diphtheria Protection

Nature Ramblings: Potato Beetle

Exercise Good for Teeth Theory Seems Contradicted

Venus Enters Planetary Races

Insanity Gives Release from Hard Life

Setting Commercial Standards Relinquished by Government

Spectroscope Puts Rainbow to Work for Industry and Science

Front Matter

“Wallace’s Line”: “A Classic of Science”

First Glances at New Books

Study of Croatans Reveals No Link with Lost Colony

In Science Fields