[SHUTT & spencer] MINERAL CONSTITUENTS OF OTTAWA RIVER 



177 



Only seventeen litres were obtained at this time and it was consequently 

 found impossible to make the analysis of this sample as complete as 

 was later found desirable. The second sample was taken on the 15 th of 

 July of the same year; at which time we may suppose the river had 

 still nearly its summer flood level. They therefore represent the water 

 of the Ottawa river at this locality under low-water (winter) and high- 

 water (summer) conditions. 



By reason of the small mineral content of this water, as larsre 

 quantities were used for each determination as the sample permitted. 

 Needless to say the work was performed with the greatest of care, and, 

 wherever possible, duplicate, and in some cases triplicate, determinations 

 were made. 



In the following tables the data are reported in three forms: — As 

 basic and acid radicles, as ions, and as compounds possibly present in 

 the water. 



Table No. 1 gives the uncombined results in the form that has 

 been most customary in the past and which will probably be best under- 

 stood : 



I. Analysis of Ottawa River Water at Winter and Summer Levels. 



Silica (SiO^) 



Sulphuric anhydride (SO3) 



Carbon dioxide (COj) (by calculation) 



Phosphoric oxide (P2O5) 



Chlorine (CI) 



Iron Oxide (Fe 2 O3) 



Alumina (Alj O3) 



Manganese Oxide (Mng 0^) 



Lime (CaO) 



Magnesia (MgO) 



Potash (K2O) 



Soda (NajO) 



p.p.m. 

 6.52 



3.70 



not det. 

 .50 

 .34 

 .38 

 not det. 

 12.57 

 3.87 

 not det. 

 not det. 



p.p.m. 

 7.06 



2.51 

 18.34 

 .43 

 .50 

 .70 

 .52 

 .86 



8.18 



2.77 

 .67 



2.14 



