[ 3 6 ° ] 
and fo clofely is air united to the other ingredients of 
the water, that it is not wholly expelled from them 
by a fcaiding heat of 160 or 170 degrees of the fcale, 
when expofed thereto for two hours. 
Which experiments therefore prove, that this air 
is not detained in the pouhon water, by the preffure 
of the atmofphere, or by any other external force, 
as is the air with which beer, or other fermentiug 
liquors, are often furcharged, while they are con- 
fined in bottles : but that this elaftic fluid is equally 
mixed with the watery element, and with the other 
ingredients of which this mineral water is compofed, 
and exiits with them in a (fate of folution, or in a 
fixed flate, being attached to the water, and to the 
other ingredients diflolved therein, by a force iuffi- 
cient to keep them all united together in one uni- 
form compound, while this force is not removed by 
fome external caufe. 
It further appears, from the fame experiments ( d ), 
that fo long as this air continues united to the other 
ingredients of the pouhon w 7 ater, its martial and ab- 
forbent earths do alfo remain fufpended therein ; but, 
fo foon as any part of this air is expelled by heat, 
thofe earths begin to feparate from the water, which 
then grows white and turbid ; and when, by con- 
tinuance of the heat, more of this air is expelled, 
more of the earthly particles alfo feparate from the 
water, in the fame proportion as its air is feparated 
from it ; and while only a fmall portion of the air 
remains, fome portion of the martial earth alfo re- 
mains diflolved in the water, as appears from its 
{d) See Experiment the fecond. 
giving 
