Analyfis of the Air. nj 



in the like mixture the quantity of Water 

 was double to that of the oil of Vitriol, 

 then but half fo much air was abforbed. 



Experiment C. 



I will next fhew, what effect feveral Al- 

 kaline Mineral bodies had on the air in fer- 

 menting mixtures. 



A folid cubick inch of unpowdered Chalk, 

 with an equal quantity of oil of Vitriol, fer- 

 mented much at firft, and in fome degree 

 for 3 days; they generated 31 cubick inches 

 of air. The Chalk was only a little diffolved 

 on its furface. 



One hundred and forty-fix grains, or near 

 one third of a cubick inch of Chalk, being 

 let fall on two cubick inches of fpirit of 

 fait, 8 1 cubick inches of air were generated, 

 of which 36 cubes were reforbed in 9 days. 



Yet Lime made of the fame Chalk abforb- 

 ed much air, when oil of Vitriol was poured 

 on it ; and the ferment was fo violent, that 

 it breaking the glals veffcls, I was obliged to 

 put the ingredients in an Iron velTcl. 



Two cubick inches of frefh Lime, and 

 four of common white wine Vinevar ablorb- 

 ed in 15 days 22 cubick inches of air. 



Q_2 The 



