20 COLORADO COLLEGE STUDIES. 



through the main channel. The foremen of the bottling de- 

 partment of the Manitou Mineral AVater Company's plant 

 report that a diminution of the flow of both water and gas 

 occurs in the Navajo group of springs during the coldest 

 weather of winter. It is to be observed that the spring 

 waters never become turbid or roily after storms and freshets, 

 although the surface streams are especially affected in this 

 way. One of the springs of the Hiawatha group (the covered 

 one) is slightly turbid from insoluble salts which probably 

 result from reactions occuring in close proximity to the 

 spring. Some of the spring waters on standing, quickly de- 

 posit a precipitate, while others, even from the same group 

 of springs, remain clear for a much longer period. Con- 

 siderable pressure is developed by the escaping gas when the 

 waters are immediately bottled and hermetically sealed as 

 soon as drawn from the springs. Large glass vessels are apt 

 to be burst by the pressure of gas if filled cpiite full before 

 sealing. 



The surface waters in the district under examination con- 

 tain relatively very small quantities of mineral matters in 

 solution; nor are there springs or pools in the area which 

 drains through the Ute Pass that are known to be highly 

 mineralized. In the upper part of the Pass between Cascade 

 and Green Mountain Palls there are springs and small 

 marshy spots where a notable quantity of hydrated sesqui- 

 oxide of iron is liberated from ferruginous waters, and these 

 waters come apparently from the granites on the south side 

 of the Pass. No thermal springs are found in this vicinity 

 other than those at Manitou. 



Taking the three analyses given above as a basis of dis- 

 cussion, and using also the later results as data, certain points 

 among the many possible inferences will here be noted, 



1. All the springs hold the same salts in solution, a fact 



which seems to point to a common origin. 



2. The waters of the Navajo and Manitou springs are almost 



identical in mineral contents, while the Ute Iron spring 

 contains a much smaller quantity of dissolved salts. 

 There is also a difference in the weight of the residues 



