t H ] 



and very frequently by tenants at will. 

 This kind of draining, where it can be 

 praftifed, is the neatefl and beft ; but it 

 would be certainly an improvement, if 

 the depth of the drains were varied accor- 

 ding to the bed of the fprings. One 

 univerfal principle in this mode of drain- 

 ing mufl be attended to, which is, to get 

 a good outfall, or difcharge, and to draw 

 all the drains obliquely, acrofs the defcent 

 of the ground, not right down with, nor 

 right acrofs the fall. The advantage is ob- 

 vious ; for if a fpring rifes in any part of 

 the ground, it cannof, in this cafe, have 

 far to run, before it finds the means of 

 getting oif s but if the drains were drawn 

 right down with the defcent, it might 

 coze down, parallel with the drain, for 

 a furlong in length before it would get 

 into it, tho' it were only at the diftance of 

 ten yards from it. And, on the other 



hand. 



