40. YORKSHIRE. 227 



iary depth oi tht Jhore, Marsh Mills* 

 placed in the lower parts of the fite will, in 

 any ordinary cafe, do away the deficiency of 

 fall. 



The expence of a mill is in the firft in- 

 ftance confiderablc-; befides an annual ex- 

 pence of repairs, and attendance. But fup- 

 pofing the firft coft to be one or even two 

 hundred pounds, and the repairs and atten- 

 dance to be ten or even twenty pounds a-year, 

 the whole expence would be inconfiderab'e, 

 when compared with the improvement of 

 converting, perhaps, two or three thoufand 

 acres of unprodu^ive fenny grounds into ara- 

 ble, MEADOW, and pasture lands, oifve, 

 or perhaps ten times its value. 



In the cafe immediately under notice, 

 mills, if requifite, could only be efFedlve 0:1 

 one fide of the river. The rivulets on 

 the north fide of the Derwent are too copious 

 to be difcharged by a mill. But by embank- 

 ing thofe rivulets, and by furnifliing each 

 compartment of the marfh with a mill, the 

 defircd improvement might on a certainry 



CL2 be 



*■■ See NoRF. Ecoy. Mm. 118, 



