1 1 8 Analyfts of the Aire 
cubick inches in an hour or two. It is 
very obfervable, that air \vas generated 
while the ferment was fmall, on the firft 
mixing of the ingredients : But when the 
ferment was greatly increafed, fo that the 
fumes rofe very viftbly, then there was a 
change made from a generating to an ab» 
forbing ftate$ that is, there was more air 
abforbed than generated. 
That I might find whether the air was ab- 
sorbed by the fumes only of the Aqua Regia> 
or by the acid fulphureous vapours, which 
afeended from the Antimony , I put a like 
quantity of Aqua Regia into a bolthead b y 
(Fig. 34.) and heated it by pouring a large 
quantity of hot water into the ciftern x x y 
which flood in a larger vefiel, that retained 
the hot water about it, but no air was ab- 
forbed 5 for when all was cold, the water 
flood 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 in- 
to the bolthead b: Yet in the diftillation of 
compound Aquafortis, Exper. 75. a little 
was abforbed. Hence therefore it is pro- 
bable, that the greateft part, if not all the 
air, was abforbed by the fumes which arofe 
from the Antimony, 
Ex pe- 
