WEATHER GOVERNED BY THE SUN — ABBOT 



111 



r^\Otn^rtt>i — OjrjCn^tfOf^" 



Although these repetitions of features at 23-year intervals are not 

 precisely similar, and are sometimes displaced in phase by a few 

 months, as in the third appearance of the sentinals at Nagpur just 

 pointed out, yet they give some promise of value for long-range 

 forecasting. In figure 16 I show for Bismarck, N. Dak., forecasts 

 based on these similarities covering a period of 12 years both for 

 temperature and for precipitation and their verifications. In figure 



