Mineral Waters of Canada. 269 
The bromine and iodine were determined by evaporating fifty 
pounds of the water to a small bulk, separating the earthy precip- 
itate, and finally evaporating the residue to dryness. This was 
treated with alcohol of sp. gr. 835 until all traces of iodids and 
bromids were removed. The alcoholic solution was then evapo- 
rated to dryness, and the treatment renewed with alcohol of -820; 
this process was repeated a third time, having previously ignited 
the residue to destroy any organic matters, and the solution being — 
again evaporated to dryness,, was dissolved in water, and the 
amount of iodfne determined after the admirable method of Las- 
saigne, which consists in precipitating it as an iodid of palladium. 
_ The bromids and chlorids remaining in the solution, were de- 
composed by a solution of nitrate of silver, and the mixed pre- 
cipitate of chlorid and bromid of silver, after being fused and care- 
fully weighed, was submitted in a state of fusion to the action of 
a current of dry chlorine gas, until the whole was converted into 
chlorid ; from the loss, the amount of bromine was by 
calenlation. 
he total amount of carbonic acid was determined by mixing 
measured portions of the water at the source, with caustic am- 
monia and a solution of chlorid of calcium; the proportion of 
carbonic acid in the precipitate thus obtained, was determined in 
the usual manner. The amount of carbonic acid required by 
those bases which were known to exist as carbonates in the water, 
Was then deducted. The quantity of carbonate of soda was cal- 
culated from the excess of sodium over that required for the sat- 
uration of the chlorine, bromine, iodine and sulphuric acid, con- 
trolled by the amount of carbonate of baryta obtained by treating 
a solution of the solid residue of 1000 grammes of the water 
with chlorid of barium; the two results closely agreeing. 
1000 parts of the water of the Gas Spring gave— 
Chlorine, . : i é ‘ . 4-242810 
Bromine, i 5 : ‘ . 011730 
lodine, i ; ‘ : : . °000461 
Sulphuric acid (SO*), ‘ ‘ 002400 
Soda, . ; : ‘ : 3726400 
Potash, . al ‘ : ; 022 100 
i ; ; ‘0828380 
Magnesia, 254600 
Ajumina, 004400 
Sies, . ; : i. 031000 
Iron and manganese, races, 
Carbonic oid, ‘ 705000 
These may be combined to form the following compounds— 
Chlorid of sodium . : . . 6°967500 
of poekmiin 030940 
