Feature

Germs’ Conquests Aided by Strange Spreading Factor

Nobel Prize Rewards Study of “Atom” of Heredity

New Cyanide Antidote Promises Great Usefulness

Biologist Finds Multiplicity of “Castes” Even in America

In Science Fields

Machine Age Benefits Upheld; Better Distribution Demanded

Nature Ramblings: Irreversible Evolution

Front Matter

Dry Ice Strengthens Ice Box against Electric Refrigerator

New Cycle of Sunspots May Begin in Next Few Months

Oxygen Tube Replaces Tents and Rooms

Buffalo Meat Again to Cheer Indians