[ 2 ] 



on any fubjefts to be handled, of his fort. 

 That the difficulty at leaft herein is very great, 

 may be learned from a moft experienced 

 modern author of like kind, namely Mon- 

 fieur de la ^lintinye ; who fays, " That in 

 " all that variety of fpeculations, that ferve 

 for the entertainment of our intelleftual 

 " faculties, there is not any fubjed: more 

 " nice, and intricate to adjuft rightly, than 

 " that of vegetation.'* 



That thofe perfons therefore, who may 

 unadvifedly take this T'raSi in hand, to read 

 with the foft view of pleafurable amufe- 

 ment only, may not on their firll difappoint- 

 ment, lay it down again, on too hafty a 

 diffatisfadlion, without the chance of being 

 reconciled to proceed, by fome refpite from 

 a continual and uninterrupted attention to 

 any chargeable abftrufenefs by them, in a 

 part, or two— 



As alfo on the hopes to inure even fuch 

 the better, to the burthen of a little more 

 thought than they might otherwife be in- 

 clined to beftow upon it— 



And 



