NO. lO STORM FREQUENCY IN THE UNITED STATES KULLISIER II 



Iff' iio'ni'iio' w y iQQ' pr 90' gv 3o' 7r 70' tf jq' x f 



1880-82 1890-92 1903-05 1913-15 1924-26 1935-37 



vs. vs. vs. vs. vs. vs. 



1886-88 1899-01 1909-11 1920-22 1931-33 1941-43? 



Two bands Two bands 



Three bands in a Three bands in a Tliree bands ? 



IJ' pattern 'f pattern 



minus plus plus minus minus plus 



plus — minus — plus ? 



minus minus plus plus minus 



Fic. II. 



