6 T^be Principles of Part I. 



which yet remain to be tried. Without 

 this guide we may Humble on truths by 

 accident ; but when led by it, we have the 

 fecret fatisfaction of thinking, that we are 

 indebted to ourfelves for the happy ilTue of 

 the experiment. 



LET us try to find ibme fixed point 

 from which we may have a full view of 

 this extenfive art, and from which we may 

 proceed, in a methodical manner, to the 

 divifion of our fubjec~t. All organized 

 bodies receive their increafe from the recep- 

 tion and application of certain particles, 

 which are defigned by the Author of na* 

 ture for their nourishment. Without thefe 

 nutritive particles there could be no in- 

 creafe. As plants belong to the clafs of 

 organized bodies, they thrive in proportion 

 to the quantity of nourishment they receive 

 at their roots. Hence arifes a fimple, but 

 very comprehenfive, view of hulbandry. 

 The whole of the art feems to centre in this 

 point, viz. nourHhing of plants. 



BUT 



