264 



SALMON OF THE KARLTJK RIVER, ALASKA 



Table 22. — Results of chemical analyses of the waters of Karluk Lake and Thumb Lake in 1036 



[The results are stated in milligrams per liter of water. Tr = Trace] 



KARLUK LAKE, STATION 1 



1 Time a. m. except as uoted. 



• Time p. in. 



Applying the correction [actor of 1.44 to the 1927 silica values, il is found that, 

 tin- silica content of the various streams ranged from 1.4 to 5.0 milligrams per liter. 

 In 1935, the silica values ranged from 5.0 to 13.0, and in 1936 they ranged from 4.0 to 

 15.0 milligrams per liter. In both 1935 and 1936, it was noted that the silica content 

 of the. water of any one stream varied with the stream flow. In the summer months 

 of 1927 there was 1.6 times as much precipitation as during the same period in 1935, 

 and 3.4 times as much as in 1936; hence, the stream flow in 1927 must have been con- 



