Feature

[Photograph]: Measures Flow

Prof. Jean Piaget: A Moving Picture World

In Science Fields

Long-Range Forecasting

Hearing Apparatus Sets Own Limit on Pitch and Loudness

Model of Moon Displayed at the Franklin Institute

Scientists Hope to Separate Gas Isotopes by Whirling

Cotton Roads of the South Are New Crop Outlet

Front Matter

Hope for Saving Workers Exposed to Silica Dust

[Photograph]: Sun Cooker

Survey Birmingham, Alabama, for Value of Spray for Polio