V 



262 



DRAINING 



Sect. XI. i. 6. 



X 



fprings, have generally the fame Inclination as the furface of the hill, 

 or nearly fo ; it follows, that the holes fhould be bored, and the ditch 

 cut, not vertically downwards, as is the common pradice, but per- 

 pendicular to the furface of the mountain ; as by that means the fe- 

 cond ftratum will fooner be arrived at ; as (hewn in Plate V. at the 



J 



^nd of this Se<5lion. 



6. But if on cutting a ditch five or fix feet along the bottom of the 

 hill perpendicular to the rifing plain, which forms the fide of it, the 

 upper ftratum be not cut through ; and in confequence no water 

 oozes into the bottom of the ditch ; it is then proper to bore other 

 holes at the bottom of this ditch fome yards deeper, or till water rifes 

 up through them itito 



the ditch, if it can be fo difcovered 



Wh 



ere 



th 



fucceeds, many holes (hould be bored, and the wa 

 ) the ditches, and conducted into the adjacent river ; 

 will then rife into the bottom of this ditch fix feet below th 



ved 



for th 



furface of the vallev. and th 



flow away, rather than rife up from 



the lower wall-fprings, or apertures of the flratum, throuojh th 



mbe 



foil 



the furfac 



f 



e 



high 



ey, which is fo many feet 



This well underftood is the great fecret for drainino- thofe 



ds, where the fp 



b 



Th 



method h 



; cut into fimply by a ditch, 

 been fome years pradifed with fuccefs by Mr. 

 Elkington, but was prevloufly ufed and explained by Mr. Ander- 

 fon, as he afiTerts in his introducSlion to Vol. III. of his EfiTavs 011 

 Agriculture, who funk a hole into the earth at the bottom of a ditch 

 in the year 1764, and the water rofe fix feet above the furface of 



the ground, and has continued to flow with lefs violence ever fince 

 that time. 



It fhould here be noticed, that where the water rifes with g 

 force through holes thus bored into a deep flratum, it 



is 



ble to 



bring 



P 



O" 



with it much fand, fo as fometimes to obflrudi 



pafiTage ; which fand in this cafe mufl frequently be removed for 

 few days by the reapplication of the auger. 



Of this a remarkable 



8 



fiance 



