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marked K : It is a hexagon, of 366 yards 

 circumference. 



The old courfe of the Medlock is marked 

 out by the lines dotted thus : 



Inftead of permitting it to continue in that 

 courfe, it was enlarged into the fize it now 

 appears in the plan, the circular end of which 

 is all raifed on mafonry. The outward line 

 of the wear, K, K, K, regulates the height 

 of water in the canal ; the higher that 

 edge is, the higher is the water. The 

 river Medlock y thus enlarged, falls fifteen 

 inches over that edge of mafonry, into a 

 frefh furface of water, marked L, L, L; 

 this is likewife all raifed of flone-work; 

 near the center of it is a well M of eleven 

 yards diameter, down which the whole river 

 falls feveral yards depth. It is received at 

 bottom in a fubtcrraneous pafTage, marked 

 N, N, and flows out at O, where it ap- 

 pears a common river, falling into the /r- 

 "well, at P. 



The fubtcrraneous pafTage N, was made 

 of that length, for a very material reafon ; 

 at Q^ is a communication between "the 



end 



