Feature

Maclure on North American Geology: “A Classic of Science”

Species New to Badlands among Fossils at Princeton

Scientist Gives Principles for Practical Propaganda

Nature Ramblings: ‘Simmons

First Glances at New Books

First Glances at New Books

Front Matter

Dangers of Dust in Industry Described at Safety Congress

Copy of Columbus’ Map Found in Constantinople

Suicide Increase Not All Due to Depression

Three-Fourths of Cancer Group Succumb in First Five Years

Indium Output May Soon Reach Ten Pounds a Year