Set. V. Agriculture and Vegetation. 195 



DUNG feems to prevent other difeafes 

 arifing from too great a quantity of moif- 

 ture. An experiment, performed by a gentle- 

 man of my acquaintance, will fhow this 

 effecl: of dung in a flrong light. He fal- 

 lowed two acres of poor ground, which had 

 never got any manure, with a defign to fow 

 wheat on it j but altering his fcheme after- 

 wards, he laid feme dung on a fmall part of 

 it, and fowed the whole, after it had got five 

 furrows, with barley. A great quantity of 

 rain fell. The barley, on that part which 

 was dunged, was very good j but what was 

 on the reft of the field turned yellow after 

 the rains, and when ripe, was not worth the 

 expence of reaping. This experiment 

 {hows, that the moifture and poverty of the 

 foil was the caufe, and that the dung was 

 the cure of this difeafe. 



PLANTS and trees certainly decay for 



want of proper nourishment. This is the 



caufe why the leaves fall ofT at the approach 



of winter. It appears plainly from the fol- 



O 2 lowing 



