[ **o3 
when their Gas is gone, they are found to contain 
two Sorts of fuch-like Earths ; the one abforbent, 
fermenting with Acids 5 and the other fixt, or Talcky : 
And that this Subfiance is really Talcky, is confirmed 
by the digging up of a pretty deal of Talc in the fink- 
ing this Well. 
All the Salts of the medical Waters are more gene- 
rally alcalinc than acid, being of a Martial Nature, 
impregnated with Sulphur, which gives them a mu- 
riatic Tafle. 
We may hence conclude, that this Weftafoton Water 
is a very good Chalybeat Water ; and, by Report, more 
plentiful and more confiant all the Year round, than 
the Well at Holt, which Spring diminifhes much at a 
certain time of the Year ; but both feem alike for their 
Virtues, and phyficalUfe, being both alike Martial. 
XXI. An Examination of the Chiltenham 
Mineral Water , by Conradus-Hieronymus 
Senckenberg 5 which may ferve as a Method 
in general for examining Mineral Waters. 
T HE Water is bright and clear to the Sight, of 
no Smell, yet of a bitter Tafle. 
To know its condiment Parts, the following Ex- 
periments were made 5 and,firft, to try whether there is 
any ale aline Salt in it. 
Rhenijh Wine was mixt with the Mineral Water. 
Rhenijh Wine is a fubtilized Acidam ejfentiale in a 
ipirimous and oily Liquor: Wherefore an alcaline 
Salt fib Quid have been manifefted ; but it was un- 
altered, Di- 
