t)S OF MILLS. 



water, the stream strikes the float-boards at the 

 lower part of the wheel. In the third, the water 

 is poured over the top, and is received in buckets 

 formed all round the wheel. 



The following is a description of a corn-mill of 

 the most common sort : 



A B (Plate 3. fig. 12.) is the water wheel, which 

 is generally from IS to 54 feet in diameter, reck- 

 oned from the outermost edge of any float-board at 

 A, to that of the opposite one at B. The water 

 striking on the floats of this wheel, drives it round, 

 and gives motion to the mill. The wheel is fixed 

 upon a very strong axis, or shaft C, one end of 

 which rests on D, and the other on E, within the 

 mill-house. 



On this shaft, or axis, and within the mill-house, 

 is a wheel F, about eight or nine feet in diameter, 

 having cogs all round, which work in the upright 

 staves, or rounds, of a trundle G. This trundle is 

 fixed upon a strong iron axis, called the spindle, 

 the lower end of which turns in a brass foot fixed 

 at H, in a horizontal beam H, called the bridge- 

 tree ; and the upper end of the spindle turns in a 

 wooden bush fixed into the nether mill-stone, 

 which lies upon beams in the floor I. The top 

 of the spindle above the bush is square, and goes 

 into a square hole in a strong iron cross, abed 

 (Fig. 13.), called the rynd ;' under which, and 

 close to the bush, is a round piece of thick leather 

 upon the spindle, which it turns round at the same 

 time as it does the rynd. 



The rynd is let into grooves in the under sur- 

 face of the running mill-stone K, and so turns it 

 round in the same time that the trundle G is 

 turned round by the cog-wheel F. This mill-stone 

 has a large hole quite through its middle, called 



