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SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 10/ 



ordinates of the mean curves of temperature departures range from 

 2?5 F. in July to 6?5 F. in January. 



Table 3. — Position of maxima by years. March values. 



Mean positions, igio to 1945, and deviations from the mean. 



Mean shift of phases in nearest whole number days 



6. COMPARISON OF TEMPERATURE EFFECTS IN WIDELY 

 SEPARATED STATIONS 



It is of interest to compare these results for Washington with similar 

 ones for other stations. Not to delay this publication unduly by a 

 long period of computation, I have contented myself, for the present, 

 with employing only the stations Helena, Mont., and St. Louis, Mo., 

 and have computed only for January and October. Only years from 

 1924 to 1943 have been used for these stations. Nothing surprising 

 resulted from these tabulations. The temperature effects were as ob- 

 vious as for Washington, and of the same order of amplitude. Shift- 

 ings of phase were found of the character explained above, and wide 

 ranges of amplitude were found in different years. Employing only 

 years in which the curves were very well defined at both stations com- 



