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Under of Wax was only a Coat of Wax, of about 
half an Inch thick, on a wooden Cylinder of four 
Inches Diameter : Now I have always found my Stick 
of Wax, which confifts of nothing elfe, to emit lu- 
minous Effluvia very plentifully, and rather in a 
greater Degree than the glafs Tube. 
If we conclude with the Englifh Fhilofophers, that 
Fire is mechanically producible from other Bodies, 
by Collifion, Attrition, <&c> or, according to Sir 
Ifaac Newton , by putting the fulphureous Particles 
of Bodies into a very ftrong vibratory Motion 5 by 
which means they become hot and lucid, /. e. affed 
us with Ideas of Light and Heat j on this Suppofition 
may we not conclude, that the Adion on the glafs 
Tube, when it is rubb’d, by putting the Parts of it 
into fuch a Vibration, and, coofequently, agitating 
violently the fulphureous Panicles therein, may heat 
and kindle them? And may it not alfobe (uppofcd, 
that when the Air is in a due State, nitrous or other 
Particles in the Air may contribute to the kindling 
them > Or perhaps, rather that fubtil, adive, elaftic 
Subflance, which Sir Ifaac Newton fuppofes to be 
the Caufe of the Refradion, &c. of Light, and which 
communicates Heat to Bodies, and is univcrfally dif- 
fufed? Thefe Effluvia , being thus agitated and con- 
vey’d by a non eletdric Body intervening, in a due 
Quantity, to the Vapour of the warmed Spirit, may 
be fuppofed to kindle them, without exciting any 
originally-refidcnt Fire in the Body immediately 
communicating with them 5 the luminous Effluvia 
from the Finger, or Ice, &c. when brought near the 
inflammable Body, being, as far as we can perceive, 
of the very fame kind with thofe which proceed 
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