Dr. Cutbush on the Chinese Fire, &e. 127 
of the case, causes a pie enatr that produces the recoil, and 
consequent motion of the wheel. The ascension of a 
rocket may be regarded as asing more than its recoil, the 
direction of which is given by the rocket stick, which serves 
also.as a balance 
ith regard is the approved formule for the preparation 
of Chinese fire, which are said to surpass even those of the 
Chivne, the ioloning are the most perfect: 
Composition of Chinese Bre. for: calibers under ten twelfths 
Sig 
of an inch. 
tMeal powder - -— - 16 oz. 
Nitrate of potash - - - 16do. 
ulphur - er taut - 4 do. 
Charcoal - - - : 4 do. 
Puly. Kans: iron - . - 14 do. 
Another of the same. 
Meal powder 16 oz. 
Sulphur - - - . - 3 do, 
Charcoal - - - - - 3 do. 
Puly. cast iron - - - 7 do. 
enother, —e — trees -_ psa 
Nitrate - potash 12 oz. 
Meal powder . - . - 16do. - 
Sulphur: - - - - 8 do. 
Chareoal - - < - - 4do. 
Pulv. Cast iron =. 9 - + 10 do. 
~Inother, oe for Po Be Us oe t £ of an inch, 
of potash 16 oz.’ 
Sulphur - - - - - 8 do. 
Meal powder - - - . 16 do. 
Puly. Cat iron - “a - - $5 ao: 
. * The term lion i ish the di ter of thecout, or taba, in 
= be © composition is put 
ised. 
der is u understood the granulated gun powder pulver: 
The oe wep done on a aay with a roller, and the 
The mealing nH ncnere memanes om it is put into a leather sack, and 
Beat With mallets, 
