Prevailing temperatures and dates of collections of rusts, Madison , Wisconsin , 1902-1903 . 
Christman—Wintering of Grain Rusts. 
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ctf 
Q 
November 
Temperatui 
December 
Tempera tu] 
January 
Temperatui 
February 
Tempo ratui 
March 
Temperatui 
g. t. = Puccinia graminis tritici. r. s. = Puccinia rubigo-vera secalis. p. = Puccinia poarum, 
c. = Puccinia coronata. r. t. = Puccinia rubigo-vera tritici. * — No germination. 
