1 1 8 Analyjls of the Air. 



firft three or four hours, ahd then abforhed, 

 fourteen cubick inches in an hour or two. 

 It is very obfervable, that air was generated 

 while the ferment was fmall, on the firft mix- 

 ing of the ingredients : But when the ferment 

 was greatly increafed, fo that the fumes rofe 

 verv vifibly, then there was a change made 

 frbrri a generating to an abforbing ftate; that 

 is, there was more air abforbed than gene- 

 rated. 



That I might find whether the air was ab- 

 forbed by the fumes only of the Aqua Regia, 

 or by the acid fulphureous vapours, which 

 afcended from the Antimony^ I put a like 

 quantity of Aqua Regia into a bolthead b> 

 (Fig. 34.) and heated it, by pouring a large 

 quantity of hot Water into the ciftern x x t 

 which flood in a larger veffel, that retained 

 the hot water about it, but no air was ab- 

 forbed 5 for when all was cold, the water 

 Aood at the point z, where I firft placed it : 

 And I found it the fame, when, inftead of 

 Aqua Regia, I put only fpirit of Nitre into 

 the bolthead b; yet in the diftillation of com- 

 pound Aqna-fortisy Exper. 75. a little was ab- 

 forbed. Hence therefore it is probable, that 

 the greateft part, if not all the air, was ab- 

 forbed by the fumes which arofe from the 

 Antimony, E x- 



