Feature

Psychologists Mass to Attack World’s Social Problems

Nature Ramblings: Survival of the Longest

Cities Watch Seattle Meat Grading Experiment

First Glances at New Books

Front Matter

Present U. S. Patent System Founded 100 Years Ago

Diabetes Treatment Improved by New Insulin Compound

Hope Neutron Rays May Prove More Efficient than X-Rays

1,200,000-Volt X-Ray Tube Is Now under Construction

World’s Largest Cyclotron at Michigan University

Chemistry Makes Dry Bones Reveal Ancients’ Blood Types

Three Vast Submarine Canyons Found off Atlantic Coast