4 DURATION OF 



CHAPTER VI. 



ON THE DURATION OF PARTICULAR 

 VARIETIES. 



Writers of the highest reputation concur in the opin- 

 ion, that the existence of every variety is limited to a 

 certain period: no kind of apple now cultivated, is 

 supposed to be more than two hundred years old 

 this term does not exceed the age of a healthy tree. 

 It is the opinion of Mr. Knight, that all plants of this 

 description, however they may be propagated, partake 

 of the same life in some degree, although not affected 

 by any incidental injuries to the parent after they are 

 separated from it: the duration of varieties may be 

 lengthened considerably by the influence of warmer 

 climates, for all the old kinds succeed best in warm 



situations. 



, 



The Stire apple of Hereford in England, is suppo- 

 sed to have long passed the zenith of its perfection. 



