242 R. BELL — DIFFERENTIAL RISING OF LAND ALONG BELL RIVER. 



Canada, and by Gilbert. Spencer, Upham, Fairchild, and others all the 

 way from Ohio to New England. 



There is the plainest evidence that at a very recent geological period the 

 land has been rising all around Hudson bay and in the Arctic and sub- 

 Arctic regions of the Dominion as well as on the Atlantic coast of British 

 North America. It would be, a priori, unreasonable to suppose that such 

 an extensive earth-movement could suddenly cease. That it has not 

 ceased, but is steadily going on at the present day around our great in~ 

 land sea, was, I think, demonstrated to the satisfaction of this Society at 

 the annual meeting last December, in a paper by the writer on " Proofs 

 of the rising of the land around Hudson bay." 



The object of the present article is to state what the author considers 

 to be evidence that the uplift now going on is not uniform, but that the 

 old differential elevation toward the northeast still continues. The evi- 

 dence relates more particularly to one portion of the great region around 

 Hudson bay, but there are phenomena of various kinds in several parts 

 of this extensive territory which may help to prove that the differential 

 movement is in progress over a wide area. Some of these may be here 

 briefly mentioned. 



Testimony of the Lakes. 

 changes in the outflow of lake temagami. 



Lake Temagami, between lake Huron and the Ottawa river, sends a 

 tributary to each. Their outflow from the opposite ends of the lake, 

 which is 30 miles long, is over clean boulders and solid rock, and yet 

 the northern outlet is diminishing while the southern is increasing in 

 volume. 



ARRESTED OUTFLOW OF SAINT LAWRENCE LAKES. 



The arrest of the outflow of the upper three of the great lakes of the 

 Saint Lawrence by way of lake Nipissing and the Mattawa river, and the 

 subsequent discharge of these lakes to the south in comparatively recent 

 times, is another case in point. Several examples of dry beds of rivers, 

 which apparently once flowed northward, have been seen by the author, 

 but further investigation would be required to show that the change had 

 not been due to the melting of glacial ice. 



Testimony of the Streams. 



rivers on west side of hudson ba y. 



On the west side of Hudson bay the Churchill river runs eastward 

 parallel to the Saskatchewan-Nelson, at an average distance of 100 miles 



