Feature

“Oldest American House” Dated by Tree Calendar

Species New to Badlands among Fossils at Princeton

Important Mammoth Find Uncovered on Golf Course

First Glances at New Books

Scientist Gives Principles for Practical Propaganda

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

Raising Houseflies Now a Business

Different Breathing May Cause Scientists’ Diverging Views

Sun, Moon and Stars in the Movies

Front Matter

In Science Fields

Discarded Batteries Caused Lead Poisoning Outbreak