202 3 T. S. Hunt on the Chemistry of Natural Waters. 
* 
was obtained a mixture of soda and potash, combined only with 
carbonic, sulphuric and boric acids. By directly determining 
e other ingredients the boric acid was estimated from t 
aiid was found equal to 0-028 parts in chee of water, whi con- 
tained 0-752 of solid matters. The conversion into carbonate 
of the sulphates in the mixed salts, ‘5 "the aid of bicarbonate of 
baryta, would simplify this process. In § 35 it has been ex- 
plained that the amount of carbonate of soda in the waters of 
the third ot fourth classes was generally calculated from the 
excess 0 alkaline bases, and controlled by the amount of 
carbonate of theta precipitated from chlorid of barium by the 
3 alkaline salt. It was found, however, that this last meth 
. eave presented a certain deficit, dus to the borate of soda, — 
? —— sete in many of the waters, is too large to be disre- 
wal ated as chlorids by the aid of chlorid of i 
num, we the 2 ta thus obtained the following ~— ients 
were found by calculation for 1,000 Seated of 5 water 
Carbonate of soda, - - 94 
borate of soda, - a - = = £306 
lorid of sodium, - 6 Se a ee Oe 
Carbonate of potash, - - - - = - 1818 
Bilitays” eo : 
17520 
The potasium as above determined, equals 11°46 per cent of 
the bases weighed as chlorids; another trial gave 11°41. Al 
ao ais in $48 the ain 
ia it has been shown that these contained 9 
ic ay insufficient to form bicarbonates with 
present. It was partly with this fact 
more than. seventeen years I un- 
