Bui. 916, U. S. Dept. of Agriculture. 



Plate I. 



















/ ' «•:--/ 



• 'AX 







I j." 







i, 



^jfe^f. 









/ ^^ 



iiLir i-^ 



■• $ 



F 



Freezing Injury to Potatoes Artificially Produced. 



The potatoes were undercooled at 25° F. for 24 hours, then inoculated by dropping 

 6 inches. In one hour after inoculation they were removed to a warm room. 

 One specimen (Irish Cobbler, fig. 1) shows only slight freezing injury of the ring 

 type. The other specimen (American Giant, fig. 2) shows severe injury of the 

 ring and blotch type. 



