Notes on Mineral Waters. 
493 
Iron in sulph. acid. 
Copper. 
Lead or arsenic.’ 
Arsenic particularly. 
The quantity of saline > 
matter generally. j 
Sulphuric salts gene- £ 
rally. 3 
The gasses generally. 
Sulphure ted hydro- 
gen gas. 
Carbonic acid gas. 
Efflorescent salts asp 
those with basis of soda, c 
Deliquescent salts, of 
the mu rials. 
Nitrate 
i 
Hydrat of Barytes, to detect the 
a.cid. 
Digesting in carbonat of ammo® 
nia, or pure ammonia :■ arseniat of 
potass making Schule’s green. 
Hydrosulphuret of amm. sul® 
phuret of lime or potass, (a brown 
black precipitate.) 
The garlic, white, fumes on 
burning it : the whitening of two 
pieces of brass or copper, the 
arsenic being fastened between 
them. 
Gentle evaporation in a glass or 
china basin : evaporate if possible 
not less than a pint. 
Their insolubility in strong boil- 
ing alcohol. 
Evaporate in a glass retort with 
a pneumatic apparatus. 
The odour: the deposition of 
sulphur on throwing up an acid 
gas : the water containing it, black- 
ens silver and lead and their solu- 
tions. 
Hydrat of lime, baryta or stron- 
tia : acet. of lead. 
Their crystals efflorescing on 
exposure to air. 
Their crystals deliquescing o& 
exposure to air. 
Their deflagration,. 
Component fiarts of many salts , to aid in the analysis of mine ® 
ral waters. 
Common Sul/ihat of Lime , contains 2 1|- or 22 per. cent of watery 
that may be driven off by a continued full red heat. When the 
quantities are small, an hour’s exposure to this heat is sufficient. 
Thus deprived of its water, it contains 42,5 lime, and 57,5 acid, on 
the average of the experiments of Thompson and Berthier. 
One hundred grains of pure lime, will yield when saturated with 
sulphuric acid, 236 grains of anhydrous sulphat of lime: that is 
deprived of its water of crystallization by an hour’s red heat. Oqe 
hundred grains ©f carbonat of lime produce 130 grains of anhy- 
