[ 22 9 ] 



that penetration which fees into futurity, nnd 

 prevents obftructions unthought of by the 

 vulgar mind, merely by forefeeing them : 

 A man with fuch ideas moves in a fphere 

 that is to the reft of the world imaginary, 

 or at beft a terra incog?iita. 



The beft way of viewing the extent of 

 the mines, is by going down the fhaft and 

 coming out by the tunnel : and fometimes 

 you mufl either take this method, (which 

 was my own cafe,) or not fee it at all ; for 

 boats are not always going in, nor to be 

 had for that purpofe ; but you will feldom 

 fail of an empty boat within, by which 

 your guide, (the oftler, I think, of the inn,) 

 will convey you out. 



Near the head of the canal is another cu- 

 riofity, very well worth viewing. It is a 

 mill of a new conftruction, with many 

 powers. The firft motion is the turning a 

 wheel, twenty -four feet diameter, by a 

 fmall overfhot ftream. This wheel works 

 three pair of grinding-ftones for corn, a 

 boultino- mill, which difcharees the meal 

 divided into three forts of flour, befides the 

 feparation of the pollard and brnn ; and thefe 

 works are effected with hoes briftles, fixed 

 within the wire iieves. It likewife turns a 

 machine for making mortar, which is done 

 by being laid upon a horizontal ftone, work- 

 ed by a cogged wh eel beneath it; and the 

 horizontal ilone turns two others that are 



Q^3 fixed. 



