( it ) 



In a fliort time after, feme labourers v^ei*^ 

 Employed to open a ftone-quarry 5 and aftei? 

 digging a very fmall depth, to their great 

 amazement they found an excellent fprlng of 

 water, fo far perennial that it has never yet 

 been known to fail. We may fuppofe our 

 well-diggers had not confulted Do6tor Hal- 

 ley on the origin of fprings, or their furprife 

 would have been lefs. For, though the raia 

 cafily penetrated the light foil of the heath j 

 yet trickling horizontally through the earth 

 until it arrived at the ftone-quarry, it there 

 found a receptacle or bafon capable of retain- 

 ing it. And the further wafte and percolation 

 of the water being ftopped, it there formed a 

 fpring — a certain index of which was a parcel 

 of rulhes growing upon the fpot. 



It is allowed by all, that under^-draining has 

 done wonders in refpedl to improving land j 

 but furface-draining would do more^ were it 

 well executed, viz. as deep. Surface-drain- 

 ing ihould not be too fuperficial j though the 

 n. me feems to imply that the drains Ihould be 

 cuv only deep enough juft to let the water off* 

 They muft be made fufhciently deep to take 



Vol. II • D that 



