Feature

Heart’s Work Increased by Injecting Fluid into Veins

Muskrat Skins Now Support Million-Dollar Business

Lead Poisoning Rates Worst as a Hazard to Workers

Hope for Epilepsy Conquest Found through Brain Waves

First Step in Prevention of Feeblemindedness Taken

Camera, Balloon and Flare Record Night Wind Velocities

Severe Magnetic Storms Disturb Telegraph and Radio

New Form of Matter Found in Cosmic Ray Bombardments

Science Service Presidents

Front Matter

Pink-Hearted Cabbage from Imported Stock

Rickets Tendency Shown to Be Hereditary