296 



BOOK VIII. 



A — First mill. B — Wheel turned by goats. C — Second mill. D — Disc of 



UPRIGHT AXLE. E — ItS TOOTHED DRUM. F — THIRD MILL. G — ShAPE OF LOWER 



millstone. H — Small upright axle of the same. I — Its opening. K — Lever 



OF THE upper MILLSTONE. L — ItS OPENING. 



