26 



NOKTH AMERICAN FAUNA. 



[NO. 27. 



The following table shows the monthly extremes and means of 

 temperature at Fort Dunvegan " from observations made during 

 1880-84:" 



Summaries of temperatures taken at Fort Dunvegan, Peace River, during 



1880-1 88 J, . 



Month. 



Extremes. 



Monthly 

 mean. 



Month. 



Extremes. 



Monthly 

 mean. 



Maximum. 



Minimum. 



Maximum. 



Minimum. 



January- _ _ 



48 

 45 

 55 

 73 

 79 

 87 

 87 



-62 

 -55 

 -52 

 -27 

 20 

 30 

 34 



-11.9 

 2.6 

 20.3 

 35.1 

 50.1 

 55.9 

 60.5 



August 



90 

 78 

 72 

 58 

 46 



31 

 22 

 - 4 

 -26 



57.4 

 45.7 

 31.6 

 16.5 

 - 4.9 



February 

 March 



September 



October 



April 



November 



December 



May 



-30 



June 



Year 



July 



90 



-62 



29.9 



The following table relating to Fort St. John, Peace River, gives 

 the dates of opening and closing of the river, and other phenomena 

 dependent on the climatic conditions, during a series of years: 



Dates of occurrence of certain events at Fort St. John, Peace River. 



Year. 



Eiver 

 opened. 



First 

 goose 

 seen. 



Potatoes 

 planted. 



Potatoes 



har- 

 vested. 



Ice drift- 

 ing. 



River 

 closed. 



1865 











Nov. 12 

 Nov. 7 

 Nov. 8 

 Nov. 7 

 Nov. 8 



Dec. 10 

 Dec. 2 

 Dec. 3 

 Nov, 17 



1866 



Apr. 19 

 Apr. 21 

 Apr. 20 

 Apr. 23 

 Apr. 26 

 Apr. 18 

 Apr. 19 

 Apr. 23 

 Apr. 19 

 Apr. 16 

 Apr. 26 

 May 1 

 Mar. 30 

 Apr. 30 

 Apr. 17 



Apr. 7 



Apr. 30 



Sept. 25 



1867 _ 



1868 





Sept. 30 



1869 





1870 









1871 







Nov. 10 

 Nov. 8 

 Nov. 4 

 Oct. 31 



Nov. 15 

 Nov. 28 

 Nov. 30 



1872 







1873_ 





Apr. 26 

 May 5 

 May 8 



Sept. 20 

 Sept. 22 



1874 . 



Apr. 21 

 Apr. 15 



1875 _ _ 





1887___ 







Dee. 3 

 Nov. 16 

 Nov. 24 

 Dec. 21 



1888 











1889 











1890 __. 











1891 

















1 





THE BASm OF GREAT SLAVE LAKE. 



Great Slave Lake may be briefly described by quoting in part the 

 account of R. G. McConnell : 



Great Slave Lake, so far as known, lias a superficial area, including islands, 

 of about 10,400 square miles, and ranks flftli among the great lakes of the 

 continent." No complete survey of its shores, however, has yet been made, and 

 our knowledge of its geography is still confined to the disconnected explorations 

 of Hearne, Mackenzie, Franklin, Back, and Petitot.^ These give the lake a 

 total length from east to west of about 288 miles. Its width is variable, and 

 in one place exceeds sixty miles. It is situated along the western margin of the 

 Archaean axis, and had originally the form of a great cross with one arm pene- 



« It is exceeded in size by Superior (31,500), Huron (23.800), Michigan 

 (22,300), and Great Bear (11,400). [McConnell.] 



* The less known eastern part of the lake has been carefully examined 

 recently (1899) by Dr. Robert Bell and J. Macintosh Bell, of the Canadian 

 Geological Survey, but, as far as I know, the report on the work has not yet 

 been published. 



