PI. 236. 



THE EFFECT OF A FREEZE ON PAPAYA FRUITS. 



The Florida freeze of February 3, 1917, occurred^ early in the 

 morning, the temperature dropping to +26.5 F. just before 

 sunrise. Almost immediately the green papaya fruits became 

 studded with drops of coagulated papain whifh issued by the 

 thousand from breaks in the thin skin. The photograph here 

 reproduced was taken at about 10 o'clock on the morning ot 

 the freeze. Few plants would appear to be more ideal for use 

 than this papaya (Carica papaya) in the studies which are 

 urgently needed into the physiology of death by freezing. 

 (Photographed by David Fairchild at Miami, Fla., February 

 3, 1917; P20390FS.) 



