120

BEER.

motion. When the axis is turned round, these arms agitate the malt in the tun, and giveit a constant tendency to rise upward from the bottom.

The motion of the axle d, is produced by a wheel, x, on the upper end of it, which is

wmm.

turned by a wheel, w, fastened on the middle of the tube b, which turns freely roundupon its central axis. Upon a higher point of the same tube b is a bevel wheel, o,receiving motion from a bevel wheel, o, fixed upon the end of the horizontal axis » •»,

gk-F

8 (giv?

which gives motion to the whole machine. This same axis has a pinion, p , uponit, which gives motion to the wheel r, fixed near the middle of a horizontal axle,which, at its left hand end, has a bevel pinion, f, working the wheel before mentioned.By these means, the rotation of the central axis b will be very slow compared with themotion of the axle d ; for the latter will make seventeen or eighteen revolutions on itsown axis in the same space of time that it will be carried once round the tun by themotion of the shaft b . At the beginning of the operation of mashing, the machine ismade to turn with a slow motion; but, after having wetted all the malt by one revo-lution, it is driven quicker. For this purpose, the ascending shaft / g, which gives