Ip? Analyfis of the Atu 
attrafting fubftance, powerfully attracts and 
fixes the elaftick particles of air 5 fo that there 
muft needs be a good quantity of un-elaftick 
air particles in oil and flower of fulphur : 
The firft of which is made by burning ful- 
phur under a bell, the other by fublimation : 
In further confirmation of this it is obferved, 
that Oleum Sulphuris per Campanam is with 
more difficulty made in a dry than a moift 
air j and 1 have found by Experiment purpofe- 
ly made, that a Candle which burnt 70 '* in a 
very dry receiver, burnt but 64' in the fame 
receiver, when filled with the fumes of hot 
water; and yetabforbed one fifth part more 
air, than when it burnt longer in the dry air. 
Sulphur not only abforbs the air when 
burning in a homogeneal mafs, but alfo in 
many fermenting mixtures; and as Siilfaac 
Newton obferved the attraftive and refraftive 
power of bodies to be greater or lefs, as they 
partook more or lefs of fulphurepus oily par- 
ticles; fo there is good reafon from thefe 
Experiments to attribute the fixing of the 
claftick particles of the air to the ftrong 
attraftion of the fulphureous particles with 
which he fays it s probable that all bodies 
abound more or lefs. 
That 
