Science: Tree-Rings & Weather

Such a babble of speculation, such a jumble of conflicting theory has arisen in recent years about long-range weather forecasting that the rich, inquisitive Carnegie Institution of Washington lately decided that it must have more information on this stormy subject. Last week it seemed eminently proper that the Institution should turn to a man who knows how much rain has fallen every year, wet or dry, in various corners of the world, for hundreds and even thousands of years.

Though Andrew Ellicott Douglass is a capable astronomer and director of the University of...