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Note All The Vents In The Under Side Of The Cases Must Be Lighted


at once, and the sharp point of the cone cut off; at which place make

it spherical.





WHEELS.



Wheel-cases are made to any length; which must always depend on the

size of the wheel, but must not exceed the length of each angle.



Charge for wheel-cases, from 2 oz. to 4 lb.



lb. oz.

Meal-powder 4 0
<
r /> Saltpetre 1 0

Brimstone 0 8

Charcoal 0 4



The filings in this composition may be varied by using a portion of

sea-coal, glass-dust, saw-dust, &c., or a combination of the whole.



SLOW FIRE FOR WHEELS.



lb. oz.

Saltpetre 0 4

Brimstone 0 2

Meal-powder 0 1-1/2



or, 1 oz. of brimstone may be used with 1 oz. of antimony.



DEAD FIRE FOR WHEELS.



oz. dr.

Saltpetre 4-1/4 0

Brimstone 0-1/4 0

Lapis-caliminaris 0 2

Antimony 0 2



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