Feature

Fifty Million Years of Wild West

In Science Fields

Quinine from Peruvian Bark: “A Classic of Science”

Scientist Directs Huge Magnet in Attack to Smash Atom

Life Expectancies for Machinery Worked Out

Whooping Cough May Have Dual Personality

Nature Ramblings: Woolly Bears

Bacteria Made to Change Forms by Change of Food

Mt. Washington Station Begins Work for Winter

Front Matter

Cosmic Rays May Be Emitted When Magnetic Poles Combine

Milk Pasteurized by Conducting Electricity