Feature

Earth Slowing with Age

Front Matter

[Photograph]: Refracting Shield

Sugar Beet Chemical

Epsom Salt in Muscles Stops Pregnancy Ill

Books of the Week

Weedkiller Attacks Grass and Broad-Leaved Weeds

Dandruff Traced to Lack of B Vitamin

Thanksgiving Is All-American

New Positive Particle without Mass Discovered

Longer Radio Relays by Short Waves past Horizon

Nature Ramblings: Ferns