2% 6 Analyfis of the Air. 



ing Experiments, that acid fulphureous fuel 

 conftantly attracts and condemns a confider- 

 able part of the circumambient elaftick air $ 

 An argument, that there is no fire endued 

 with peculiar properties inherent in fulphur $ 

 and alio, that the heat of fire confifts princi- 

 pally in the brisk vibrating action and re- 

 action, between the elaftick repelling air, and 

 the ftrongly attracting acid fulphur, which 

 fulphur in its Analyfis is found to conrain an 

 inflammable oil, and acid fait, a very fix'd 

 earth, and a little metal. 



Now fulphur and air are fuppofed to be 

 acted by that ethereal medium, li by which 

 " ( the great Sir Ifaac Newton fuppofes ) 

 <c light is refracted and reflected, and by 

 <c whofe vibrations light communicates heat 

 <c to bodies, and is put into fits of eafy re- 

 ff flection, and eafy tranfmiffion : And do 

 <c not the vibrations of this medium in hot 

 <c bodies contribute to the intenfenefs and 

 fC duration of their heat? And do not hot 

 cc bodies communicate their heat to conti- 

 ic guous cold ones, by the vibrations of this 

 * c medium, propagated from them into cold 

 <c ones ? And is not this medium exceed- 

 " ingly more rare and fubtle than the air, 

 " and exceedingly more elaftick and active? 



" And 



