OF MILLS. J3 



which will soon be melted by the heat the spindle 

 acquires from its turning and rubbing against the 

 bush, and so will get in betwixt them ; otherwise 

 the bush would take fire in a very little time. 



The bush must embrace the spindle quite close, 

 to prevent any shake in the motion, which would 

 make some parts of the stones grate and fire against 

 each other; whilst the other parts of them would 

 be too far asunder, and by that means spoil the 

 meal. 



Whenever the spindle wears the bush, so as to 

 begin to shake in it, the stone must be taken up, 

 and a chisel driven into several parts of the bush ; 

 and when it is taken out, wooden wedges must be 

 forced into the holes ; by which means the bush 

 will be made to embrace the spindle again, close all 

 round. In doing this, great care must be taken to 

 drive equal wedges into the bush on opposite sides 

 of the spindle ; otherwise it will be thrown out of 

 the perpendicular, and so hinder the upper stone 

 from being set parallel to the under one, which is 

 absolutely necessary for making good work. When 

 any accident of this kind happens, the perpendicu- 

 lar position of the spindle must be restored, by 

 adjusting the bridge-tree with proper wedges put 

 between it and the brayer. 



It often happens, that the rynd is a little 

 wrenched in laying down the upper stone upon it, 

 or is made to sink a little lower on one side of the 

 spindle than on the other; and this will cause one 

 edge of the upper stone to drag all round upon the 

 other, while the opposite edge will not touch. But 

 this is easily set to rights, by raising the stone a 

 little with the lever, and putting bits of paper, cards, 

 or thin chips, between the rynd and the stone. 



