Publisher's Synopsis
Excerpt from Climatic Cycles and Tree-Growth, Vol. 2: A Study of the Annual Rings of Trees in Relation to Climate and Solar Activity
Prediction possibility has been one of the great incentives to recent work upon tree-rings. There seem to be two approaches to long-range forecasting. One is by direct tracing of the physical causes and the other is by learning the history of past changes and working out empirical methods. Each needs the other; so the climatic history written in trees is doubly useful, for it may of itself give means of foretelling the future, if such can be found, and, on the other hand, if the physical causation is traced first, the derived line of causes must agree with and explain this known history in trees. Thus pre diction will gain at once greater reliability. The last chapter in the book deals with the various climatic cycles found in trees.
The effort to find a basis of seasonal prediction is the modern phase of an age - Old problem. In our day of newspapers, calendars, and clocks it is hard to realize that at the beginning of prehistoric agriculture farmers knew little of the time of day or the time of year except as signs in the heavens told it to the rare man who had learned the language of the sky. We are now in the same stage of ignorance regarding yet longer cycles and hope to find our time in relation to them so that we may know better when and what to produce each season for modern needs.
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