IX.] 



CHEMISTRY OF NATURAL WATERS. 



125 



that of Montreal, which is 44.6 F., so that this is a thermal 

 water. Another alkaline and saline spring in the same parish 

 has also a temperature of 53 F. The water of the spring here 

 described has a sweetish saline taste, and is much relished by 

 the cattle of the neighborhood. Three analyses have been 

 made of its waters, the results of which are here given side by 

 side. The first was collected in October, 1851 ; the second in 

 October, 1852 ; and the third in August, 1864, during a very dry 

 season. 



In 1,000 parts 2.1652 2.1322 1.9917 



A portion of barium is included with the strontium salt. 

 The water contains moreover a portion of an organic acid, which 

 causes it to assume a bright brown color when reduced by evap- 

 oration. Acetic acid gave no precipitate with the concentrated 

 and filtered water ; but the subsequent addition of acetate of 

 copper yielded a brown precipitate of what was regarded as 

 apocrenate of copper. The organic matter of this and of many 

 other mineral springs has probably a superficial origin. The 

 carbonic acid was determined in the third analysis, and was 

 equal in two trials to .903 and .905. The neutral carbonates 

 in this water require .452 parts of carbonic acid. 



[ 45, 46, give the analyses of six more waters of Class 

 IV., none of which are as highly charged with mineral sub- 

 stances as that of Charnbly, though holding from 0.34 to 1.55 

 parts of solid matter to 1,000. All of these waters are found 

 in the valleys of the St. Lawrence and of Lake Champlain, 

 and are believed to rise from the Utica or Hudson Eiver shales. 



