^^. Y O R K S II I R E. i77 



great care is reqiiifite in forming the bed of 

 the rill. 



The fall is therefore regulated in a great 

 degree by the quality of the ground. On 

 good ground the channel is nearly level. 

 Over faulty ground the water runs with a 

 current ; for the double purpofe of getting 

 quickly over it, and rendering its channel 

 the more retentive. 



The principal enemies of artificial rills are 

 leaves in autumn and fnows in vvinter. To 

 remove the obftructions which thefe not iin- 

 frequently caufc, and to repair fuch breaches 

 as time will always m^ake in the vs'orks of art, 

 & fupennundan( IS necelTary to every artificial 

 rill. 



The Rill of Kirrymoorside is, I be- 

 lieve, the largeft, and was the firft, v/hich was 

 brought upon thefe Heights*. Since the in- 

 troduction of this, feveral others have been 

 Vol. I. N raifed j 



* This rill was brought to the villages of Gilliinore 

 and Fadmore near forty years ago ; and has been ex- 

 tended to Kirby about thirty years ; by Joseph Ford ; sz 

 fclf-taught engineer, of great ingenuity and fonie judgj 

 ment j a man to whom the country ei<;cj mvich, 



