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SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 8/ 



Fig. 6. — Temperature departures for Williston, N. Dak., and their periodicities. 



A, original data; C, 7-month; D, 8-month; E, 11 -month; F, ij^-month; G, 

 18-month; H, 21-month; I, 25-month; J, 28-month; K, 45-month; L, 68-month; 



B, residual after removing periodicities, doubtfully showing ii^^-year periodicity. 



