Feature

Clouds Make Day Bright When Sun Is Partly Hidden

1931 Leonids Best in Years, Many Astronomers Report

Action of Steel under Stress Revealed in Writing on Sand

Coal in Small Doses Stimulates Plant Growth

Lean Indians to Eat Surplus Park Buffaloes

Artificial Limbs Made from Seamless Metal Tube

Front Matter

Artificial Gamma Radiation Approximates Cosmic Rays

Insects Active on Many Battlefronts Until Frost

Disease-Bearing Mosquitoes Able to Ride on Airplanes

[Photograph]: Home for Research

Stone Age Men Made Tools of Rock Crystal