Feature

X-Rayed Seeds Help Crops

Immune Mice Get Cancer

Anniversaries of Science

Homes as Weather Bureaus

Teeth Tell Man’s History

Maternal Irradiation

Front Matter

Evolution Fights Loom

[Photograph]: Dr. George D. Birkhoff

New Chemical for Boilers

Fur Coats Come from Foxes, Calves and Rabbits

Scientist, Executive, Publisher