228 The Ottawa Naturalist. [February 



These data show that the " total solids " in the waters as 

 received consisted almost entirely of suspended rock matter. 

 The amounts of dissolved mineral and organic matter are 

 extremely small. 



We may conclude from the analytical results obtained that 

 the Glacier water is one of great organic purity. It is evident, 

 however, that it cannot be considered as always constant as 

 regards either the amount of its organic or mineral constituents; 

 the latter, as we have seen, however are scarcely to be regarded 

 as an intregral part of the water. The samples were collected 

 twelve days apart, and probably at different points, which facts 

 may allow us to understand the nature of the causes for the 

 slight variations in the analyses. 



The point of greatest interest, after establishing the high 

 degree of purity of the water, is the large amount of finely divided 

 rock matter in suspension. This is present in such quantities as 

 to make the water quite milky in appearance, and is so fine that 

 the water must stand for some weeks before thorough subsidence 

 is effected. Microscopic examination of the deposit so formed 

 proved it to consist almost entirely of fragments of quartzite. 



For the following npte on the geology of the district we are 

 jnjJebted to Mr. R. G. McConnell, of the Geological Survey. 



"The rqcks in the vicinity of thq Glacier ^re of Cambrian 

 ^e ^nd consist largely of bluish quartzites and finq grained 

 conglomerates holding pebbles of quartz ^d feldspaf imbedded 

 in a hard silicious matrix. In addition to these, greenish ar^^ 

 dark schists of volcanic origin also occur in the neighbourhood. " 



]^eiboratpj-y of the Experimental F^fms. 

 Qtty^vy^, l^ebj., 6|.h, f 899. 





