OF MILLS. 69 



the eye of the stone, through which the middle 

 part of the rynd and upper end of the spindle may 

 be seen ; whilst the four ends of the rynd lie below 

 the stone in their grooves. 



One end of the bridge-tree which supports the 

 spindle rests upon the wall, whilst the other is let 

 into a beam called the brayer, L M. 



The brayer rests in a mortice at L • and the 

 other end M hangs by a strong iron rod N, which 

 goes through the floor I, and has a screw-nut on 

 its top at O; by the turning of which nut, the end 

 M of the brayer is raised or depressed at pleasure, 

 and consequently the bridge-tree and the upper 

 mill-stone. By this means, the upper mill-stone 

 may be set as close to the under one, or raised as 

 high from it, as the miller pleases. 



The nearer the mill-stones are to each other, 

 the finer the corn is ground ; and the more remote 

 from one another, the coarser. 



The upper mill-stone is inclosed in a round box, 

 which does not touch it any where, and is about 

 an inch distant from its edge all round. On the 

 top of this box stands a frame for holding the 

 hopper P, to which is hung the shoe Q, by two 

 lines fastened to the hinder part of it fixed upon 

 hooks in the hopper, and by one end of the string 

 II fastened to tiie fore part of it ; the other end 

 being twisted round the pin S. As the pin is 

 turned one way, the string draws up the shoe 

 closer to the hopper, and so lessens the aperture 

 between them ; and as the pin is turned the other 

 way, it lets down the shoe, and enlarges the 

 aperture. 



If the shoe be drawn up quite to the hopper, no 

 corn can fall from the hopper into the mill : if it 

 be let down a, little, some will Jail ; and the quan- 



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