154 flature'0 



Mountains, is said to have an underground 

 outlet. This must be the case, because the 

 area of the lake is very small as compared with 

 Salt Lake, while the river that feeds the latter 

 is very small compared with the one that flows 

 into the former. That is to say, in the one 

 case a very small stream empties into a large 

 lake, while in the other case a much larger 

 stream feeds a very small lake. Besides, 

 Humboldt Lake, unlike the Great Salt Lake, 

 is said to be a fresh- water lake; if it had no 

 outlet it would become in time saturated with 

 salt. The largest body of water in the world 

 having no outlet to the ocean is the Caspian 

 Sea, on the border between Asia and Kussia 

 in Europe, it being 180,000 square miles in 

 extent. 



Where rivers empty into large bodies of 

 water, such as the great chain of lakes on the 

 northern border of the United States (and 

 these lakes have an outlet connecting one with 

 the other, and finally by a river to the ocean) 

 a constant circulation is being kept up, and 

 the water remains fresh. Owing to the fact, 

 however, of the great evaporating surface 

 that these lakes afford, there is a greater dis- 

 proportion between the rainfall upon the 

 drainage area tributary to these lakes, and the 

 amount of discharge through the St. Law- 

 rence Kiver, than would be the case with a 

 river that was not connected with a system of 



