378 



Royal Society : — 



decomposition of felspathic debris iii presence of earthy carbonates. 

 By the mingling of these sokitions of carbonate of soda with the 

 bitterns of tlie Umestones, the carbonate of lime would be precipitated, 

 except so far as an excess of carbonic acid were present, while car- 

 bonate of magnesia would remain in solution, as in the Carlsbad waters. 

 The mixture of these alkaline springs with sea-water would yield 

 similar results. 



From my analyses of more than sixty of the different mineral 

 springs of Canada, to be found in the pubUshed reports of the 

 Geological Survey, I select a few characteristic waters of each class, 

 giving here only approximatively the determinations of the principal 

 ingredients for lOUO parts. 



A. Saline waters, containing little or no earthy carbonate. 



B. Alkaline waters, feebly saline. 



C. Saline waters, holding abundance of earthy carbonates. 



a. Neutral, containing earthy chlorides. 



b. Alkaline, containing carbonate of soda. 



Few of the above waters contain sulphates, but baryta and strontia 

 are present in very many of them ; the amount of these two bases 

 in the Yarennes spring is equal to '016, while in that of Lanoroie, a 

 water of the class B, containing 12"88 of solid matters, there were 

 found '030 of baryta and "021 of strontia. Small quantities of 

 silica, alumina, phosphoric acid, manganese and iron are present in 

 all of these springs, and in the alkaline and many of the saline waters 

 a portion of boracic acid ; the borate is included with the carbonate 

 of soda in the above analyses. Bromine and iodine are found in all 

 the saline waters. I have shown, in my analyses of five alkaline 

 saline waters from Caledonia and Vareunes, that the amount of 



