Anafyfis of the Air. 297 



bf the parts is the ftrongeft ; For by compa- 

 ring Experiment 49 and 51. we fee that 

 much more air was found in the distilla- 

 tion of horn than of blood. And the co- 

 hefion of animal fubftances was not, as we 

 find by the fame Experiment, difiblved even 

 in the blood, without confiderable violence 

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

 tal degree in our blood, by that more fub- 

 tile diflblvent fermentation : But we may 

 pbferve, that volatile Salts, Spirits, and ful- 

 phureous Oil, which are at the fame time 

 feparated from thefe fubftances, will not 

 gnake elaftick air. 



Experiment CXX. 



As elaftick air is thus generated by the 

 force of fire, from thefe and many other 

 fubftances 5 fo is the elafticity of the air great- 

 ly deftroyed by fulphureous bodies. 3ir Ifaac 

 Newton obferves, " that as light a£fcs upon 

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

 " phurs ought to acT: moft upon light/ 9 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 



