Anahfis of the Air. 21 y 
abforbed by others, and by others alter- 
nateiy generated and abforbed. 
Experiment XC. 
I poured upon a middle fized Gold Ring, 
beat into a thin plate, two cubick inches 
of Aqua Regia \ the Gold was all diflblved 
the next day, when I found four cubick 
inches of air generated $ for air bubbles 
were continually arifing during the folu- 
tion : But fmee Gold lofes nothing of its 
weight in being thus diflblved, the four 
cubick inches of air, which weighed more 
than a grain, muft arife either out of the 
pores of the Gold y or from the Aqua Re°> 
gia , which makes it probable, that there 
are air particles in acid fpirits 5 for by Ex- 
periment 75, they abforb air, which air 
particles regained their elafticity, when the 
acid fpirits which adhered to them were 
jnore ftrongly attracted by the Gold, than 
by the air particles. 
■ 
Experiment XCI. 
A quarter of a cubick inch of Antimony , 
and two cubick inches of Aqua Regia, ge- 
nerated 38 cubick inches of air, the firft 
three or four hours, and then abforbed 14 
cubick 
