[ 4-8 ] 
fmall Pains to determine, how far this Power can 
penetrate through a dry Originally, electric 5 and 
have found, by repeated Trials, that either in a Cake 
of Wax alone, or of Wax and Refin mixed, when 
the Electricity is very powerful, it has paffed, I fay, 
in ftrait Lines through thefe Cakes of the Thick- 
nefs of ^ Inches and T L; but I never could make it 
act through one of a Inches and 5 for in this it 
was perfectly flopped. So that the Cakes commonly 
made ufe of to flop the Electricity, by being too 
thin, fuffer. a confiderable Quantity of the electrical 
Power to pervade them, and be loft in the Floor. 
I make no Doubt, if the electrical Power could be 
more increafed, it would penetrate much further 
through thefe Originally-electric Bodies* 
Proposition III. 
Electricity, in common with Light likewife, when 
its Forces are collected, and a proper Direction given 
thereto, upon a proper Object, produces Fire and 
Flame. 
Corollary. 
The Fire of Electricity (as I have before obferved) 
is extremely delicate 5 and fets on fire, as far as I 
have yet experienced, only inflammable Vapours. 
Nor is this Flame at ail heightened, by being fuper- 
induced upon an iron Rod, red-hot with coarfer 
culinary Fire, as in a preceding Experiment ; nor 
diminifhed by being directed upon cold Water. 
However I was defirous of knowing, if this Flame 
would 
