Eleventh Book Illustration 186
the middle of the millstone K. This type of channel grínds less than any other, although many believe that much more is ground with his kind of channel or flw11e. It is true that this channel attracts much more water than any other kind. This type of mili has a large wheellike the first channel mili set clown here. (Illustration 187) Thís ís to show where the flume is to be fixed, and also the wheel. The flume is A, the water is díscharged at B, and the water strikes from e to D, which is under the diagonal of the square, so that the water is collected by that eighth of the wheel from E to and is in contact with the paddles more or less according as the water reaches them. And let that be enough for the flume mili.
e
Another wheel is fixed to the axle at one end; which wheel is not as thick as the one which receives the water, it is half as big as the wheel with the paddles. This wheel has in the circumference sorne points, or teeth of holm-oak wood, which engage with a wooden lantern. This lantern is held .6.rm with an iron bar, which is inserted into the upper millstone, and so makes the millstone go. The wheel should be so adjusted, I mean the teeth with the lantern so that when the wheel has made one revolution, the lantern shall have made at least three revolutions; and if it be so adjusted that there are four, it will grind much more; and so if the lantern will make fíve revolutíons while the wheel makes one, it will grind much more than ít will by making only two; so that, to conclude, the more revolutions the lantern makes, the more the mili will grind, and that is a point it is very important to know. [329]
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