286 AP PE N D I X. 
ture of Water and Spirit of Nitre ftand fix or 
feven Days, and then admitted frefli Air, the 
Air in the Glafs ay became immediately red- 
i(h and very turbid, and abforbed Air, as fafl 
as the abovementioned Airs of Spirit of Nitre 
or Aqua Regia and Antimony ; but it would 
not do in any confiderable Degree a fecond 
time. 
7. When frefii Air is let into the Receiver 
ayy whofe included Air is impregnated with 
the Fumes arifing from the Mixture of comr 
pound Aqua Fortis or Spirit of Nitre, and 
Whitjiable Pyrites mentioned in the follow- 
ing Experiment, then the Air in the Receiver 
turns very red and turbid, and much Air is 
\ abforbed after feveral repeated Admiflions. 
8. When frefli Air is thus admitted into 
the Glafles full of fulphureous tho* clear Air, 
a good part of the Particles of the frefli Air 
mufl: needs be reduced, by the fulphureous 
ones from an elaftic to a fixed State, as in the 
Effervefcences of other Liquors. Therefore 
the rifin^ of the Water in the glafs Veflel 
ayy Fig. 54. does not feem to be wholly ow- 
ing to the rebating of the Air’s Elafticity in fome 
Degree, but rather to the Redudion of it 
from an elaftic to a fixed State ; which is fur- 
ther 
