540 



THE GLACIAL LAKE AGASSIZ. 



6. Water from an artesian well at Carman, Polk County, Minn. 



Ingredients dissolved in the water. 



Silica 



Alumina and oxide of iron. 



Carbonate of lime 



Carbonate of magnesia . . . . 



Carbonate of lithia 



Carbonate of potash 



Nitrate of potash 



Carbonate of soda 



Sulphate of soda 



Borax 



Chloride of soilium 



Bromide of potassium 



Iodide of potassium 



Total. 



Nitrates, absent; phosphates, absent. The test with permanganate 

 showed 0.85 parts oxygen consumed by organic matter per 1,000,000 

 water. Hardness, 12.5 degrees. This well is less saline and alkaline than 

 many others on both sides of the Red River thence northward to the 

 international bonndary; lint it is more so than most of the artesian wells 

 southward in this valley. 



G. Water from the lied River at Fergus FaUs, Minn. 



Ingredients dissolved in the water. 



Silica 



Alumina and oxide of iron 



Carbonate of lime 



Carbonate of magnesia . . . 



Carbonate of lithia 



Carbonate of potash 



Bromide of potassium 



Nitrate of potash 



Nitrite of potash 



Carbonate of soda 



Sulphate of soda 



Chloride of sodium 



Total 



14.3 



1.2 



101.0 



71.4 



Traces. 



4.2 



Traces. 



Traces. 



Traces. 



5.8 



1.8 



2.3 



7.0 

 0.6 

 50.0 

 35.4 



2.8 

 0.9 

 1.2 



0. 83412 



. 06999 



5. 89133 



4. 16476 



. 33831 

 . 10499 

 . 13456 



11. 78725 



