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Each of them takes 1000 turns of a globe 9 inches 
diameter to charge it. I fend you two fpecimens of 
tin -foil melted between glafs, by the force of two 
jars only. 
I have not heard, that any of your European elec- 
tricians have been able to fire gunpowder by the 
eledtt ic flame. We do it here in this manner : 
A fmall cartridge is fill’d with dry powder, hard 
rammed, fo as to bruife feme of the grains. Two 
pointed wires are then thru ft in, one at each end, 
the points approaching each other in the middle of 
the cartridge, till within the diftance of half an inch : 
then the cartridge being placed in the circle, when 
the four jars are difeharged, the eledtric flame leap- 
ing from the point of one wire to the point of the 
other, within the cartridge among the powder, fires 
it, and the exploflon of the powder is at the fame 
inflant with the crack of the difeharge. I am, 
S I R, 
Your humble fervant, 
Benjamin Franklin. 
O o 2 
XLV, 
