LAKES OF THE LAHONTAN BASIN. 



67 



Constituents. 



Sppcifir. frravity, 1. 0007. 



Fixed reaidue in 1,000 parts .. 



Oonstituentsfound in 1.000 parts 



Carbonic acid 



Sulphuric acid 



Phosphoric acid 



Chlorine 



Silica 



Magnesia 



Lime 



Sodium 



Potassium 



Lithia 



Boracio acid 



I Oxygen . 



Average. 



0. 9030 



0. 1070 

 0. 0253 

 0. 00069 

 0. 2952 

 0. 0325 

 0. 0274 

 0. 0176 

 0. 2785 

 0. 0609 

 trace, 

 trace. 



0. 84509 

 0. 04273 



There is probably a loss of carbonic acid. 



The theoretical combination of bases and acids would ^ive- 



A series of soundings made in Humboldt Lake, in July, 1882, gave a 

 nearly uniform depth of 12 feet for the central part. Near the western 

 shore quite extensive mud-banks rise a few feet above the surface and nearly 

 divide the lake; westward of these the water is still more shallow than in 

 the main body. The lake is being rapidly filled by the silt from the Hum- 

 boldt River, and is destined to early extinction. 



Owing to the orographic structure of the valley it occupies, the east- 

 ern shore of the Humboldt Lake is bordered by a precipitous cliff of dis- 

 placement, the western shore is low and marshy, in places covered with a 

 saline efflorescence. A sample of the incrustation from the surface of the 



