Feature

Mercury Crosses Sun and Meteors Visit Earth

Seek African Yellow Fever

Soda as Cold Preventive

New Drug for Epilepsy

Classics of Science: First Studies of Transpiration

Psychology Booming

Vitamins for Margarine

Comet Had Small Nucleus

Front Matter

Nordic Power Is Chemical

Wire Explosions Give Light Brighter than Sunlight

Building and Flying Model Airplanes: Model of Lindbergh’s Plane