Biological Sur\t:y — Genesee River 



79 



Table 3. — Chemical Analyses of Wolf Creek Waters 



Pollution: — Salt at Silver Springs; Sewage at Castile. 



(A) Investigation of dissolv- 

 ed oxygen, etc. 



Remarks 



Date:— July 30 



Temper.\ture of 

 Water, Degrees 



Fahr. 



Entering Silver Springs 



Lv. Silver Springs and salt lake 



Tributary stream No. 6, larg- 

 est tributary 



After confluence with No. 6, 

 1 mile from S. P 



In Castile 



Leaving Castile 



Steep slope, 1 m. from Genesee 



55.4 

 74.3 



59.0 



70.9 

 69.4 

 71.8 

 69.8 



Cent. 



13.0 

 23.5 



15.0 



21.6 

 20.8 

 22.1 

 21.0 



Dissolved 

 Oxygen 



Parts 



per 



million 



9.4 

 8.2 

 4.1 

 9.9 



Per cent 

 of satu- 

 ration 



67.0 

 79.0 



88.5 



111.0 

 93.6 

 47.4 



113.6 



Methyl 



orange 

 alkalinity 



p.p.m. 



calcium 

 carbonate 



161.0 

 76.5 



148.0 



115.0 

 96.0 

 104.0 

 114.0 



Carbon 



dioxide 



parts 



per 



million 



nil 



2.0 



nil 



nil 



10.1 



nil 



pH. 



7.5 



8.6 



7.9 



8.6 



7.3 



8.9 



* At time of sampling, Wolf was flowing at the rate of about 18.1 cubic feet per second. At 

 the indicated salt content, this is equivalent to a discharge of over 500 tons in twenty-four hours. 



Table 4. — Depth Samples of Silver Lake 



Date: — August 17. 

 Temp, of air:— 24°C. 



Had there been sunshine, lake would probably have exhibited greater variation in temperature 

 Water was filled with a " bloom " of Rivularia, decomposition of which was doubtless largely 

 responsible for the diminution in dissolved oxygen content of lower strata. 



