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Plural Wheels Plural Wheels Are Made To Turn Horizontally And To


consist of three sets of spokes, placed six at top, six at bottom, and

four in the middle; which last must be a little shorter than the rest:

let the diameter of the wheel be 10 inches: the cases must be tied on

the ends of the spokes in grooves cut on purpose, or on pieces of wood

nailed on the ends of the spokes, with grooves cut in them as usual:

in clothing these wheels, make the upper set of cases play obliquely

d
wnwards, the bottom set obliquely upwards, and the middle set

horizontally. In placing the leaders, they must be managed so that the

cases may burn thus, viz., first up, then down, then horizontal, and

so on with the rest. But another change may be made, by driving in the

end of the eighth case two or three ladlesful of slow fire, to burn

till the wheel has stopped its course; then let the other cases be

fixed the contrary way, which will make the wheel run back again; for

the case at top you may put a small gerbe; and let the cases on the

spokes be short, and filled with a strong brilliant charge.



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