Feature

Patent Split Nail to Hold Building Materials

Polio Epidemic Decided in Next Week or So

In Science Fields

Probe Mystery of Why Tropical Fish Turn Poisonous

Coronary Sufferers Live Average Five Years

Back Matter

Audubon Painting on This Week’s Cover

Better Plane Windshield

Meat-Less Food Looks and Tastes like Sausage

Naphtha Aviation Gas

To Match Colors, Don’t Lie down on the Job

Thumb-Suckers’ Hay Rake