Feature

Front Matter

Child Invents Tools like Those of Stone Age

In Science Fields

Enriching Ores Foreseen to Support Steel Industry

New Evolutionary Ladder Outlined for Man’s Ascent

Oldest Known Christian Art Being Exhibited at Yale

Three Planets Decorate Evening Sky

X-Ray Tube Gives Radiation Equal All Radium in World

Quaternions: “A Classic of Science”

First Glances at New Books

Growth-Checking Substance May Control Cancer Tissue

Parents’ Behavior Foretells Results of Treatment