I :)o 



attention to Kand i McNally's new map of Canada [exhibited] where 

 the nests of lakes te!l the story better than I can. 1 have drawn two 

 lines on it including the region of these lakes which is seen to be a 

 little above, and westward of the Cambro-Silurian beach on the Geo- 

 logical Siir^y map. 



The railwav levels of the Toronto Canada Pacific branch, crossing 

 the belt from west to east, show a gradual descent, at a low elevation 

 above the sea, from Tweed in the valley of the Moira River 324 ft., to 

 Perth station in the valley of the Kideau 184 ft above the sea. There 

 is a summit between, 20 miles east of Sharbot Lake, in the middle of 

 the lake belt, 505 ft. above the sea. 



This summit is distant from Welch's terrace on Kings mountain- 

 CO miles in a direct line; and its elevation is I GO ft. lower than the 

 terrace. The railway levels are from the section of the old Ontario and 

 Quebec, now Canada Pacific Railway ; my own elevation of Welch's 

 terrace was obtained by means of two good aneroid barometers read at 

 Hull station 185 ft. above the sea, at Kings mountain, and again at 

 Hull the same day on recurning, so as to eliminate at once the w^eather, 

 and any instrumental iri'egularities. 



Now let us take the train to Brockville, and examine what the 

 valley of the St. Lawrence has to tell of the connection between the 

 pleistocene salt water sea, and the valley of the great Canadian lakes. 

 The Geological Survey reports have so fully described the country of 

 the Archfean neck below Kingston, that I need not recall many points. 

 Kinsrston at the foot of Lake Ontario is 246 ft. above the sea, as shown 

 on my section. All the surrounding country is low and level. The 

 leda clays are visible at many ])oints along the St. Lawrence, between 

 Kingston and Brockville, either on the Canadian or the American side. 

 To make a long story short the condition of things is precisely that 

 described at Quyon. To this I have to make the exception of the fact 

 that marine fossils have not been found in these clays above Brockville 

 as they are above Quyon. That these clays are continuous with the 

 valley of the great lakes, and are identical with the lake region clays, I 

 can simi)ly state on the authority of Mr. G. K. Gilbert who has made 

 a study of this region, and of the pleistocene outlet of Lake Ontario in 

 the State of New York, including the localities under consideration. 



