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capable of being multiplied to almoft any diftance. 

 Hence in many parts of the kingdom, the farmers 

 vvhofe lands are contiguous unite in preventing the 

 increafe, by cutting them down before they feed; 

 but this operation, though deftru(flive to fome fpc- 

 cies, will only palliate the bad elFedls. of others. 



To be acquainted with the qualities of each kind, 

 we mud obferve them with much attention, and 

 view them in a botanical and philofophical light : 

 this alone will enable us to judge with certainty 

 how far and by what means their deftrudion may 

 be effedcd. 



The Englifh Thiftles meriting notice, as more 

 or lefs noxious, are, 



I. The Carduus Lanceolatus, or Spear Thiftle 



• The tertii fVay Thljilet by which this plant has ufually been dif- 

 tinguifhed, is by no means fufficiently exprciTtve of it. The prefent 

 term may, perhaps, be thought too harfh; but it' any plant dcfcr/c to 

 have a mark fet upon it, h is certainly this. 



The 



