Feature

Early Crop Improvement Held Mostly Unconscious

1938 Birth Rate up, Death Rate Is Down

Industrial Research Cuts Costs to Consumer

[Photograph]: At Dedication

Mathematical Computation for Chances of Reform

In Science Fields

First Glances at New Books

Eclipsing Star

Blood-Brain Barrier Studied in Infantile Paralysis Fight

Paper Bags of Rock Dust Prevent Dust Explosions

Front Matter

High-Speed Electrons Create Strange Glow