Feature

Ozone Useless for T. B.

First Glances at New Books

Front Matter

Electron Bullets Deadly to Germs

Film Phonograph Plays for 2 Hours

If America Had Not Been Discovered

The Telephone: A Classic Invention

In Various Science Fields

Ancient Myth Had Basis in Fact

Signs of Culture Found in Rubbish

Congress Considers Jobless and Aged

Pipe for Gaging Speed of Light