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- Never-yielding Cement
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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
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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