fine yp 
mous Grotia del Cane near Naples: 
It is this air with which fome mine~' 
ral waters are impregnated, and to 
which they owe their pungent tafte 
and their virtue, as, for inftance, 
Seltzer waters. It is that air which 
arifes in abundance from calcarious 
ftones, by the addition of vitriolic 
acid. ‘This air may be known by 
the following properties: it extin=- 
guifhes flame; it is abforbed by wa- 
ter, and communicates to it the fame 
pungent, acidulous tafte as Seltzer 
water has, fo as not to be ‘diftin= 
guifhed from it either by the tafte 
or by its virtues; it precipitates 
quick lime from water; it immedi- 
ately cryftallizes oleum tartari per 
deliquium, when put in a veffel lined 
with this oil; it is mortal to animals 
stipes in it. ERD 2 om 
