RELATION OF LAKES TO CLOLVTIC CONDITIONS. 



81 



ill more humid regions. This is due, in a measure, to the active evapora- 

 tion £Iiat takes phiee from them and from the lakes on their courses. 



The waters of Great Salt lake luive liceii analyzed at six different 

 times. The results of these several analyses are widely at variance on 

 account of fluctuations in the volume of the lake. The dates at which the 

 various samples analyzed were collected and the total solids found in 1000 

 parts of water are here given : ^ 



Date . . . ls.")0 siuiuiier 1S09 

 Specific gravity 1.170 1.111 



Parts in 1 ()()() 



L2 



118.2 



Aug. 1873 Dec. 1885 Aug. 1889 Aug. 1892 2 

 1.102 1.122 1.157 1.150 



l.{(i.7 KJ7.2 195.5 205.1 



Since the accompanying table of anal3'sis of lake waters was compiled, 

 my attention has been directed to the analysis given below, which in 

 several ways is the most complete and satisfactory that has been pub- 

 lished. 



Analysis of a sample ok the Wateu of Gueat Salt Lake. Collected 



August 9, 1892.2 



By E. Waller. 

 [Expressed in Grams in a Liter. Specific Gravity, 1.156.] 



The average composition of the coml)ined sirring and stream waters 

 tril)utaiy to the lake cannot l)e stated with accuracy, but judging from 



1 A compilation of various analy.ses of the water of (ireat Salt Lake ami a discussion cou- 

 cernin^f them, is ,i;iven by (L K. Gilbert, Mouoij;raph Ni>. 1, V. S. (;eolo;j;ical Survey. 



2 School of Mines [Columbia College] (iuartcriy, vol. IL 1892, p. 58. 



3 A later (leteriiiinatii)n showed about 0.01 "lam nf I5r. in a liter. 



