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After fome time, they appeared almoft as healthy 

 as the reft. Thus, although he had done little 

 towards the cure, he flatters himfelf he has pointed 

 out the caufe, the infefbs on the curled plants 

 being not only very numerous, but vifible to the 

 naked eye. 



LETTER XII, 



THIS writer afcribes the caufe of the curled 

 difeafe in potatoes to the froft and bad keeping in 

 winter and fpring before fetting. They are liable 

 to.be damaged by froft after they are fet, but this 

 rhay be prevented by covering. If it be afked 

 why froft did not injure them formerly, he anfwers, 

 it; is only the new kinds which are apt to curl. To 

 this may be added, that lefs care is now taken of 



the feed than formerly. To prevent the latter, 



let them remain in the ground covered with haulm 

 or litter, till the time they are wanted for fetting 4 

 ^nd, in cafe no froft touches them afterwards, they 

 vrill be Tree from the difeafe, 



I^ E T T E R XIII. 



THIS writer fays, the red potatoe was as gene-* 



rally planted as the winter white and the Linn 



colnlhire kidney arc now. The firft, being a later 



R 3 potatoej^ 



