Feature

Cobalt Is Beneficial to Cattle and Sheep

Books of the Week

Dogs Broadcast Reactions by Way of Radio Signals

New Machines and Gadgets

Front Matter

Biology Editor Dies

Mice Exposing Man’s Ills

Adopt “New Look” in Domes for New Telescopes

Sources for Creating Food

Substance in Potatoes May Aid Body Use Proteins

[Photograph]: Testing the Atom Bomb at Eniwetok

Pregnancy Illness Relief