172 THE CANADIAN NATURALIST. [June 



§ 43. Of the waters of the third class, which follow, the first four 

 rise from the Trenton limestone, and occur on the south side of the 

 Ottawa River, in the vicinity of the first three of the preceding 

 section. The others are from the south side of the St. Lawrence 

 below Montreal. 



1, 2, and 3 are waters from Caledonia, and rise about two 

 miles from the spring No. 3, of the last table. These waters were 

 examined in September 1847. The first, which is known as the 

 Gas spring, then yielded about four gallons of water a minute, 

 and discharged in the same time about 300 cubic inches of car 

 buretted hydrogen gas, whence its name. At a distance of four 

 or five rods from this, are the second and third springs, known as 

 the Saline and White Sulphur waters, yielding each about ten 

 gallons a minute. The former affords a few bubbles of carbu- 

 retted hydrogen gas, and is not at all sulphurous, while the latter 

 contained a little sulphuretted hydrogen, equal to somewhat less 

 than a cubic inch to the gallon. The temperature of the three 

 waters was found to be respectively 44°. 4, 45° and 46° F. The 

 carbonic acid in 1000 parts of the Gas Spring was equal to .705 ; 

 of which .356, or a little more than one half, is required for the 

 neutral carbonates present. In the Saline spring there was found. 

 .648 of carbonic acid, being an excess of .292 over that required 

 to form neutral carbonates ; while in the Sulphur Spring, which, 

 contained in 1000 parts only .590 of carbonic acid, .349 are con- 

 tained in the neutral carbonates, leaving only .141 towards the 

 formation of bi-carbonates. For later analyses of these waters 

 see § 46. 



4. This, which is known as Gillan's spring, is from the town- 

 ship of Fitzroy, not very far from the last. Its waters were 

 collected in July 1850. 



5, 6. These two waters are from Yarennes, and are about 

 one hundred rods apart. The first is known as the Saline, and 

 the second is called the Gas spring, from the large volumes of 

 carburetted hydrogen gas which it disengages. The Saline spring 

 contained in 1000 parts .920 of carbonic acid, of which .451 or 

 nearly one half is required to form the neutral carbonates present. 

 In the Gas spring was found .792 of carbonic acid, leaving thus 

 .312 over that required to form neutral carbonates. The waters 

 were collected in October 1848. 



7. This is from Labaie du Febvre, and is known as Courchene's 

 spring. It evolves small quantities of carburetted hydrogen gas. 



