NO. 9 FORECAST OF U. S. PRECIPITATION — ABBOT 19 



Table 6. — Grouping of six tables when SS > 20. Period of g-1/10 months. 



Eastport, Me. 



Second half of the records, 1925 to 1956 



112 



The meaning of the symbols on figure 9 is as follows : 



ok, no shift. 



1 , shift backward. 



i , shift forward. 

 Subscripts, number of months shifted. 



