Feature

First Glances at New Books

Front Matter

Negro’s Ability to Stand High Temperatures Important

Italy’s Air Force Weaker than Several Years Ago

Hopeful Outlook for Babies Born with Heart Defect

All-American Tires Shown; Made from Petroleum

British Fighter Plane Has Turrets That Fire Broadside

Hall of Inventions Opens at N. Y. World’s Fair

Lightning Not Menace to Modern Planes

Dilatation of Carotid Artery Is Blamed for Migraine

Nature Ramblings: Strident Songsters

Failure to Respect Individual Threat to All Civilization