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much lefs certainty, than where the practice of ingrafting 

 prevails. Yet even here, on this very fubject of apple- 

 trees, we meet with one fact that ftrongly oppofes the 

 dectrine in queftion. There are two kinds of apples that 

 have been uiually employed as (locks on which others have 

 been grafted. One of thefe is called free flocks, and the 

 other crab flocks properly fo named. The plants of thefe 

 two kinds are eafily diftinguifhable from each other by an 

 experienced eye, and are well known by every nurfery^ 

 man. The curiofity is, that in fpite of the doctrine of 

 feninal vi r'.eties, {o firmly believed by every gardener, the 

 feeds of them may be bought as diftinft kinds in every 

 feedfman's (hop, and always produce plants according to their 

 kind, wherever the feedfman has been honeft. I need make 

 no remarks on this fact. 



Were I not afraid of tiring the reader, I could give many 

 other inftances of plants, which contain many varieties that 

 rife not above the clafs offeminals, even among trees and 

 fhrubs, which invariably propagate by feeds their own kind* 

 but {hall at prefent confine myfelf to the wild or dog rofe, 

 many kinds of which produce a fruit called hips, which in 

 the autumn are very beautiful. I have frequently gathered 

 the feeds of particular kinds of thefe on account of their 

 beauty, and fowed them ; nor did I ever in any inflance 

 know them to differ in any refpect from the parent plant. 



§. II, 



From what has been already faid on this fubjefr, 

 the reader will clearly perceive, that although fome 

 clafies of plants are certainly affected by being al- 

 lowed to fructify by the fide of particular varieties 

 of their own clafs j yet that there are others whofe 



varieties 



