58 THE CANADIAN NATURALIST. * [Vol. X. 



grey colour, left on ignition a light reddish-brown coloured residue, 

 this on examination was found to consist of argillaceous matter. 



The water of the Red River, after filtration, had a pale 

 yellowish tinge. The suspended matter was of a light brownish- 

 yellow colour, on ignition it left a residue, which, as in the pre- 

 vious case, consisted of argillaceous matter. 



The nature and amount of the organic matter contained in 

 these waters was not ascertained, — the quantity of the water at 

 disposal being altogether inadequate for the purpose, — apart 

 from which, it is highly probable, that, during the interval of 

 collection and analysis, the organic matter had, to some extent 

 at least, undergone decomposition, the amount of carbonic acid 

 therefore, although estimated, has not been given. 



The. analyses of these waters luere conducted hj Mr. Frank D. 

 Adams, and the following are the results obtained by him, ex- 

 pressed in grains per imperial gallon : 



ASSINIBOIXE. RED RIVER. 



Potassa 0.499 0.549 



Soda 5.324 5.028 



Lime 6.Y8.3 6.912 



Magnesia 4.588 5.142 



Alumina and ferric oxide(l)0.084 0.092 



Silica 1.571 2.208 



Sulphuric acid 4.906 7.093 



Carbonic acid ? ? 



Chlorine 1.988 3.390 



Organic matter ? ? 



Oxygen equivalent to the 



chlorine 0.448 0.765 



Total dissolved solid matter, 



dried at 100^ C 41.09 44.63 



Suspended matter — assiniboine. red river: 



Organic 0.692 0.342 



Mineral . 4.508 3.509 



Total ; 5.200 3.851 



Hardness (2) — 



Temporary 13.90 16.0.3 



Permanent 6.70 7.87 



Total 20.60 23.90 



Specific gravity 1000.64 1000.52 



