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
downwards, 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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