274 Analyjts of the Air. 
And the quicker the fuccellion of this frefli 
air is, by blowing, the more vigoroufly does 
a fire burn. 
If the continuance of the burning of the 
Candle be wholly owing to the vivifying 
Jpirity then fuppofing in the cafe of a recei- 
ver, capacious enough for a Candle to burn 
a minute in it, that half the vivifying fpir it 
be drawn out with half the air, in ten fe- 
conds of time j then the Candle Ihould not 
go out at the end of thofe lo feconds, but 
burn 20 feconds more, which it does not 5 
therefore the burning of the Candle is not 
wholly owing to the vivifying fpirity but 
to certain degrees of the air's elafticity. 
When a wholly exhaufted receiver was by 
means of a burning glafs firft filled with the 
fumes of brown paper with Nitre^ and then 
filled with frefh air, the nitrous paper upon 
applying the burning glafs did freely deto- 
nize ; and a Candle put into a like air, burnt 
for 2 8^5 which in a frefh air, in the fame 
receiver, burnt but 43 "5 but when the fame 
receiver with air in it, was filled full of 
fumes of detonized Nitre^ and a Candle 
placed in that thick vapour, it went out 
inftantly, for a Candle will not burn, nor 
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