Feature

Stratosphere Weather to Be Reported by Radio

Octane Rating of Gasoline Not Wholly Dependable

Are You Still Superstitious?

In Science Fields

Sheet Steel Roof Swings over Building

Radio Tubes Amplify and Measure Nerve Messages

Nature Ramblings: Vegetable Assassin

Front Matter

New Swiss Lake Will Run Three Power Plants

Cancer More Prevalent among Industrial Classes

First Glances at New Books

[Photograph]: Nautiloids, Once Rulers of the World