

■ 







Analyfn 



'. 



3 l ° 



in proportion to the fulphureoufnefs and 

 thicknefs of thofe fumes. 



I have alfo fhewn in many of the fore*- 

 going Experiments, that plenty of true per- 

 manent elaftick air is generated from the 

 fermenting mixtures of acid and alkaline fub- 

 ftanccs, and efpecially from the fermenta- 

 tion and difiblution of animal and vegeta- 

 ble bodies : Into whofe fubftanccs we fee it 

 is in a great proportion intimately and firmly 

 Incorporated ; and confequently, great quan- 

 tities of elaftick air mutt be continually ex- 

 pended in their production, part of which 

 does we fee refume its elaftick quality, when 

 briskly thrown off from thofe bodies by fer- 

 mentation, in the diflblution of their texture. 

 But part may probably never regain its elaf- 

 ticity, or at leaft not in many centuries, that 

 efpecially which is incorporated into the 

 more durable parts of animals and ve- 

 getables. However we may with pleafure 



fee what immenfe treafures of this noble 



and important element, endued with a 



moft active principle, the all- wife Providence 



of the great Author of nature has provided ; 



the conftant wafte of it being abundantly 



fupplyed by heat and fermentation from in- 

 numerable 





