4 Tfo Principles of Part I. 



a conclufion ! how unequal for fuch a talk 

 are the few years of judgment and activity 

 we enjoy ! How liable are obfervations to 

 die with the obferver when not made public ! 

 and how averfe is human pride to do it, 

 unlefs it could erect a fyitem ! Agriculture, 

 feemingly fo eafy, appears, from the fcarcity 

 of good authors, to be the mofl difficult of 

 all arts. 



BUT thefe are not the only obftacles 

 that hufbandry has met with. It has yet 

 had a greater to ftruggle with. It does not, 

 like moft arts, lead to an account of itfelf; 

 or depend on principles which its practice 

 can teach. Something beyond this art is 

 necefiary to the knowledge of the art itfelf. 

 The principles of all external arts mud be 

 deduced from mechanics or chymiftry, or 

 both together. Agriculture is in the lafl 

 clafs j and though it depends very much on 

 the powers of machinery, yet I'll venture 

 to affirm, that it has a greater dependence 

 on chymiftry. Without a knowledge in 



the 



