54 THE PRACTICE OF THE 



" manure?" But was not his defign likewilb 

 to prove by thefe experiments, the acquifition 

 of manure from the atmofphere ? and how 

 then can thi? author fay, tnut we cannot in 

 the Jeaft (peak of this part of Hufbandry from 

 experiment? is not this a very diiingenuous 

 manner of treating the author of thefe ex- 

 periments, and the fubjecl, he and others 

 have fince treated upon : and have not 

 they, published their experiments, to prove, 

 that the earth is fertilized by the atmofphere ? 

 and that they have proved it, we mail demon- 

 jftrate. This author recommends to the far* 

 mer, ** autumnal ploughing, on principles 

 ' that he can underitancl, and effects which 

 are vifible to him, pulverization, and the 

 *< ,killing of weeds.*' What is the farmer to 

 nnderfland by pulverization? He knows that 

 ploughing breaks or pulverizes the land ; it is 

 a mechanical action, that adds nothing to the 

 foil, adds no new matter to it : on the con-* 

 trary, by opening the foil, it is made more 

 pervious to the roots of plants to exhauft it ; 

 confeqnently, the more land is ploughed and 

 fallowed, the more it is liable to be im- 

 poverifhed by the- next crop. How then is 

 the land to recover its fertility? This author 

 tells the farmer, that this is to be done by 

 dung and manure; but he alledges, that Mr, 

 TullV defign was to fet afide the ufe of 

 manure ; ihould he not have informed the 

 farmer, what fuccefs he had in this deijgn ? 



That 



7 



