Feature

Plants, like Steel, Require Many Chemicals

Science Talent Search Washington Trip Winners

Invisible Star Discovered by Photographic Means

Bright Star Sextette

Teaching of Air and Marine Navigation Together Urged

Health Service Officer Stricken by Rabbit Fever

Reduction of Smoke and Smell from Diesel Engines Studied

Dehydrated Sweet Potato Added to Army’s Diet

Vaccination Justified for Horse Sleeping Sickness

“Laundries” Will Wash War Gases from Food

[Photograph]: Gasoline in Bags

New Electrostatic Device Picks Tin from Worthless Rock