[ 816 ] 



upon the water-wheel which draws up the 

 coals through the well E, that the power of 

 the wheel is greatly impeded, inlbmuch that 

 the work of drawing up the coals, which 

 can, at very low water, be done at the rate 

 of a boat load in twenty or twenty-five mi- 

 nutes, takes forty-five when the water is 

 high ; or, in other words, encreafes the la- 

 bour fifty per cent. This evil appears to be 

 caufed by the fubterraneous paffages being 

 funk too deep, by which means the mouth 

 U is too much commanded by the waters 

 pf the Medlock. 



Having taken this view of the works in 

 Caftle-jield, we next took polTefiion of the 

 pleafure boat we had before fpoken for, and 

 fleered for Worjley. The firfl: objects we met 

 with, were two wears more at Cor?ibroke t 

 formed on the fame principles as that in the 

 Cafile-Jiehly fwallowing up rivulets in cen- 

 tral wells, which convey the water in fub- 

 terraneous paffages under the canal, and per- 

 mit it to rile again on the other fide, and 

 flow on in its ulual courfe. 



Pafjing on, the canal runs chiefly along 

 the fides or natural banks ; \\ hich courfe was 

 very judicioufly chofen for the convenience 

 of poiTeiTing not only one bank perfectly 

 firm and fecure, but plenty of earth ready 

 for making tjie other. Jull before we came 

 10 'Throjlle-nejl Bridge, I obferved a project- 

 ing piece of maibnry in the canal, which, on 

 enquiry, I found to be the cafe of a cana.1 



door,, 



