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2 I Z 



Analyfis of the Air. 



The cffeffs of the Fermentation of mineral 



Sub/lances on the Air. 



I HAVE above fhcwn that air may be 

 produced from mineral Subftances, by 

 the adion of fire indiftillation. And we have 

 in the following Experiments many inftan- 

 ces of the great plenty of air, which is gene- 

 rated by fomc fermenting mixtures, abforbed 

 by others, and by others alternately gene- 

 rated and abforbed. 



Experiment XC. 



I poured upon a middle fized Gold Ring, 

 beat into a thin plate, two cubick inches 

 of Aqua Regia 5 the Gold was all diflblvcd 

 the next day , when 1 found 4 cubick in- 

 ches of air generated ; for air bubbles were 

 continually arifmg during the folution : But 

 fmce Gold lofes nothing of its weight 111 

 being thus diflblvcd , the 4 cubick inches of 

 air, which weighed more than a grain, muft 

 ariie cither out of the pores of the Gold, 

 or from the Aqua Regia, which makes it 



probable, that there arc air particles in acid 

 1 fpirits 5 



Li 1 1 1 



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A* 

 :»bc 



:3k TC 



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