Feature

The McCormick Reaper: “A Classic Invention”

Spiral Motion of Organisms Believed to Be Key to Sex

Healing with Maggots

Scientist Protests Ban on Foreign Exploration in China

Front Matter

New Blood Test May Decide Doubtful Parentage Cases

First Glances at New Books

Grasshopper Inroads Become Severe along Old World Front

Study of Elks May Point Way to Managing Herds

Blighted Chestnut Trees May Be Made into Paper

The Moons of Mars: “A Classic of Science”

Novel Timber Bridge Replaces Sunken Road