298 Analyfis of the Airl 



attracting fubftance, powerfully attracts and 

 fixes the elaftick particles of air ; 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 fubiimation : 

 In further confirmation of this it is obferved, 

 that Oleum Sulphuris per Campanam is with 

 more difficulty made in a dry than a moid 

 air j and I 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 3 and yet abforbed 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 5 and as Sir Ifaac 

 Newton obferved the attractive and refractive 

 power of bodies to be greater or lefs, as they 

 partook more or lefs of fulphureous oily par- 

 ticles 5 fo there is good reafon from thefe 

 Experiments to attribute the fixing of the 

 elaftick particles of the air to the ftrong 

 attraction of the fulphureous particles with 

 which he fays it's probable that all bodies 

 abound more or lefs, 



That 



