

/Jaalyfis of the Air. 297 



of the parts is the ftrongeft : For by compa- 

 ring Experiment 49 and 51. we fee that 

 much more air was found in the diftilla- 

 tion of horn than of blood. And the co- 

 hefion of animal fubftanccs was not, as we 

 find by the fame Experiment, diflblvcd even 

 in the blood, without confidcrable violence 

 of fire 5 tho' it is fometimes done to a fa- 

 tal degree in our blood, by that more fob- 

 tile diflblvent fermentation : But we may 

 obferve, that volatile Salts, Spirits, and ful- 

 phureous Oil, which are at the fame time 

 fcparated from thefe fubltanccs, will not 

 make claftick air. 



( 



Experiment CXX. 



As claftick air is thus generated by the 

 force of fire, from thefe and many other 

 fubftances ; fo is the elafticity of the air great- 

 ly deftroyed by fulphureous bodies. Sir Ifaac 

 Newton obferves, " that as light acts upon 

 " fulphur, fo fince all aftion is mutual, ful- 

 " phurs ought to act moft upon light." And 

 the fame may be obferved of air and fulJ 

 phur; for by Experiment 103, it is found 

 that burning fulphur, which is a very ftrongly 



attracting 









