Analyfis of the Air . 29 y 
the acid fpirit, the air particles do in great 
abundance rufh forth from a fixt to a re- 
pelling elaftick ftate 5 it muft needs be, that 
thefe particles did in their fixt ftate ftrongly 
attrad the acid fpirits, as well as the ful- 
phureous earthy parts of the Salt; for the 
moft ftrongly repelling and elaftick parti- 
cles are obferved, in a fixt ftate, to be the 
moft ftrongly attrading. 
But the watry acid, which when feparated 
from Salt by theadion of fire, makes a very 
corrofive fuming fpirit, will not make elaf- 
tick air, tho* its parts were put into a brisk 
motion by fire inExper. 75. And the event 
was the fame with feveral other volatile 
fubftances, as volatile Salt of Sal Ammoni- 
ac, Camphire and Brandy , which tho* di~ 
ftilled over with a confiderable heat, yet 
generated no elaftick air, in Exper. 52, <51, 
66 . Whence 'tis plain, the acid vapours in 
the air only float in it like the watry va- 
pours; and when ftrongly attraded by the 
elaftick particles of the air, they firmly ad- 
here to them, and make Salts. 
Thus in Experiment 73 we fee by the vaft 
quantity of air there is found in Tartar , 
that tho* it contains the other principles of 
vegetables, yet air with fome volatile Salt 
U 4 feems 
