[ 50i ] 
Flafhesfire the inflammable Vapour, which fires theGun* 
powder: Bat theTime between the Vapour firing the 
Powder is fo fhorr, that frequently they appear as the 
fame, and not fuccefiive Operations, wherein the Gun- 
powder itfelf feems fired by the Ele&ricity : And, in- 
deed, the firft time this Experiment fucceeded, the 
Fiafh was fo fudden and uncxpe&ed, that the Hand 
of my Afliftant, who touch’d the Spoon with his 
Finger, was confidcratly fcorch’d. So that there 
feems a fourth Ingredient necefldry to make Gun- 
powder readily take Fire by Flame ; and Thatfuch a 
one as will heighten the Inflammability of the Sul- 
phur. 
In common Cafes, the lighted Match, or the little 
Portion of red-hot Glafs, which falls among the Pow- 
der, and is the Refult of the Collifion from the Flint 
and Steel, fires the Charcoal and Sulphur, and thefe 
the Nitre. But if to thefe three Ingredients you add 
a fourth, viz. a vegetable chemical Oil, and gently 
warm this Mixture, the Oil, by the Warmth, mixes 
intimately with the Sulphur, lowers its Confiflcnce, 
and makes it readily take Fire by Flame. 
In thefe Operations, notwithftanding I always made 
ufe of the fineft-feented Oils of Orange peel, Lemons, 
and fuch-likc, yet, upon the lead: warming the Mix- 
ture, the rank Smell of Balfam (i. e. of the ready 
Solution of Sulphur) was very obvious. 
II. A 
