438 THE CANADIAN NATURALIST. [Dec. 



been observed in Grenville. One of these, on tlie fourth and 

 fifth lots, covers about thirty-six acres, and has a depth of ten 

 feet. It has been used in the neighborhood, and is pronounced 

 of excellent quality. Another deposit of about the same extent 

 occurs on the first lot of the same range, and is in some parts more 

 than fifteen feet in thickness. A third, of about thirty acres, 

 occurs on the fourth lot of the seventh ranore. On the fourth and 

 fifth lots of the first range of Harrington, is a bog of about forty 

 acres, the peat of which varies in depth from ten to twenty-five 

 feet. Another bog is described as occurring on the first and second 

 lots of the fifth range of the same township. It extends over about 

 sixty acres, and has a thickness, in some parts, of twenty-five feet. 

 All of these areas might be drained without much difiiculty. To 

 the eastward of this, a peat-bog is met with in the Rang Double 

 of Mille-Iles. It exhibits a breadth, on the road from St. Jan- 

 vier to St, Jerome, of about half a mile, and has an area of perhaps 

 five-eighths of a square mile. Its depth along the road was found 

 to be in several places from two to eighteen feet, the greater depth 

 being towards the south-east side, and its average may be taken 

 at eight feet. A smaller deposit of peat occurs half a mile nearer 

 to St. Janvier ; it has a breadth of about a quarter of a mile, but 

 its superficies and depth hive not been ascertained. Upon the 

 same great plain with these, a little to the north of the church of 

 Ste. Anne des Plaines, and on the north-east side of the road lead- 

 ing to New Glasgow, is a peat-bog having an area of about a square 

 mile. Its depth was not determined, but it is supposed to average 

 about five feet. The farmers are in the habit of burning the sur- 

 face of parts of this bog, and employing the ashes as a manure for 

 the underlying portions, until by repeated burnings they reach 

 the subjacent clay ; which, mingled with the last thin layer of 

 peat and a portion of the ash, constitutes a very fruitful soil. 



Near the front of the seigniories of Assumption and St. Sulpice 

 there is a peat-bog three and a half miles in length with an average 

 breadth of half a mile, giving an area of about 1100 acres. Its 

 depth varies from two to fifteen feet ; and the result of ten trials 

 made in two lines across the bog gave an average of ten feet. 

 In the seigniories of Lavaltrie and Lanoraye, there are two exten- 

 sive peat bogs, running parallel with each other. Of these the 

 northern is the larger, and is known as the Grande Savanne. It 

 has a length about eight miles from north-east to south-west, and 

 a breadth of from half a mile to two miles and a half, covering a 



