32 



I do not know of any explanation for the condition known as 

 Sticky Skin or Dead Skin. Microscopically the tissues in such 

 cases seem fairly normal. 



The Jonathan Spot is also hard to explain in the light of our 

 present knowledge. It seems not to be due to any organism. 

 Whether or not it is related to the physiological Fruit Pit is an 

 open question. Perhaps we will find eventually that it is a trouble 

 distinct from others enumerated. It has been suspected to be a 

 form of arsenic injury, but tests made in 191 1 by the U. S. De- 

 partment of Agriculture indicate that heavy applications of arsenic 

 do not increase the amount of spotting. It develops much more on 

 apples in ordinary storage than on those in cold storage and atten- 

 tion to this point is advised when apples give indication of develop- 

 ing this trouble. 



Applks From Uxsprayed Trees. Large Pile, Culls. 

 vSmall Pile on the Right. Saleable Fruit. 

 {Photo, by Peairs.) 



