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PAPER SEVENTH. 



OF THE DISEASE CALLED THE CURL IN POTATOES, 

 AND SOME OTHER PECULIARITIES OBSERVABLE 

 WITH REGARD TO THIS PLANT* 



*. I. 



POTATOES are fubje&ed to one particular dif- 

 eafe, the cu,rl> which it would be improper for 

 me altogether to omit 3 and though I can fay little 

 fofitive as to the caufe of this diforder, a good deal 

 may be faid on the negative fide of the queftion ; 

 which, as it may pofTibly lead to future refearches, 

 fhall here be added. 



The only thing that feems to be pofitively certain 

 with regard to this diforcler is, that it was fcarcely, 

 if at all, known till very lately; and in particular 

 that it was not known in the northern parts of this 

 ifland till a very few years ago, (I myfelf had never 

 feen it when the former parts of this treatife were 

 written) when, there is great reafon to believe, it 

 was introduced by means of feed potatoes imported 

 from the South country: and it is at this moment 

 much lefs frequent in the Northern and remote 

 parts, than in the Southern and more commercial 

 diftrifts of this ifland. 



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