HENDERSON-] QLiMATE AND EVIDENCE OF CLIMATIC CHANGES 



BOBBINS J 



45 



changes. The Basm of Turfan, the irrigation canals of Son Kul, and 

 the Basin of Seyistan in Persia, and the Turkish lake of Gyul-Jtik, 

 together with much other evidence, all show, according to Huntington, 



Fig. 1.— Mean precipitation, bj- montlis, at Santa Fe, Espanola, New York, and St. Louis. 



the gradual drying up of the country. In the New World, he con- 

 siders the migration of the Zuni, the changes for the worse in agri- 

 cultural conditions on the terraces of Peru, the extensive ruins of 



