CLIMATIC CHANGES

THEIR NATURE AND CAUSES BY ELLSWORTH HUNTINGTON

Research Associate in Geography in Yale University

AND STEPHEN SARGENT VISHER

Associate Professor of Geology in Indiana University

NEW HAVEN YALE UNIVERSITY PRESS LONDON: HUMPHREY MILFORD: OXFORD UNIVERSITY PRESS MDCCCCXXII

COPYRIGHT 1922 BY

YALE UNIVERSITY PRESS

Published 1922.

THE THEODORE L. GLASGOW MEMORIAL

PUBLICATION FUND

The present volume is the fifth work published by the Yale University Press on the Theodore L. Glasgow Memorial Publication Fund. This foundation was established September 17, 1918, by an anonymous gift to Yale University in memory of Flight Sub-Lieutenant Theodore L. Glasgow, R.N. He was born in Montreal, Canada, and was educated at the University of Toronto Schools and at the Royal Military College, Kingston. In August, 1916, he entered the Royal Naval Air Service and in July, 1917, went to France with the Tenth Squadron attached to the Twenty-second Wing of the Royal Flying Corps. A month later, August 19, 1917, he was killed in action on the Ypres front.

TO THOMAS CHROWDER CHAMBERLIN OF THE UNIVERSITY OF CHICAGO WHOSE CLEAR AND MASTERLY DISCUSSION OF THE GREAT PROBLEMS OF TERRESTRIAL EVOLUTION HAS BEEN ONE OF THE MOST INSPIRING FACTORS IN THE WRITING OF THIS BOOK

There is a toy, which I have heard, and I would not have it given over, but waited upon a little. They say it is observed in the Low Countries (I know not in what part), that every five and thirty years the same kind and suit of years and weathers comes about again; as great frosts, great wet, great droughts, warm winters, summers with little heat, and the like, and they call it the prime; it is a thing I do the rather mention, because, computing backwards, I have found some concurrence.

FRANCIS BACON