484 E. HUNTINGTON SOLAR HYPOTHESIS OF CLIMATIC CHANGES 



ing the tetaperature of the lower air, but that other causes are of much 

 greater importance. 



THE SOLAR HYPOTHESIS 



General discussion. — Having reached the conclusion that, although 

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actually in operation, they are probably of relatively minor importance, 

 we are prepared to turn to the solar hypothesis. It is most interesting to 

 see that Al>bott and Fowle and also Humphreys, in spite of their natural 

 enthusiasm over the discovery of a new factor in tbe determination of 

 climate, have not attempted to assign to it a major role. They have been 

 compelled to turn to the solar hypotliesis. Tbe second curve from tbe 



