Gearing of a grinding mill
A wheel of 36 teeth drives a six-stave pinion turning a half-braccio grinding stone.
A faint red-chalk drawing occupies the page, showing the frame and vertical shaft of a grinding mill. The accompanying note specifies its proportions: a larger wheel of half a braccio carrying 36 teeth engages a lantern-pinion of 6 staves, one-sixth of a braccio thick, which turns a grinding stone half a braccio across. The numbers 36, 1 and 61 are jotted beside the sketch.
On this page
36-tooth wheel driving a 6-stave lantern-pinion
The proportions of a mill are set out: the larger toothed wheel is half a braccio across with 36 teeth, driving a lantern-pinion of 6 staves one-sixth of a braccio thick at the centre of its staves, which in turn works a grinding stone of half a braccio.