520 



Canadian Record of Science. 



the high level reservoir, where it is 590 feet above the 

 river. 



A sliort distance to the south of this point there is an 

 isolated patch of Utica shale, resting against the trap 

 outside the black line on Fig. 4. 



The summit of the mountain at the Observatory is 739 

 feet above the river, which would give a height of about 

 150 feet for the trap above the line of the limestone. 

 These measurements may be considered as accurate, as 

 they are taken from the plan in the Road Department of 

 the city, but the line being fixed by local points, such as 



Fig. 2. 



the look-out, roads or other marks, its location must 

 necessarily be approximate, but sufficiently accurate to 

 show its general position. 



Passing towards the northern end of the mountain, the 

 altered crystalline limestone is exposed in several places 

 where the rock has been removed in making the roa,(l, its 

 position being shown by the dotted shading on Fig. 1. 



Fig. 2 shows the northern end of the mountain from a 

 point near the Incline Railway to the Mount Royal 

 Cemetery gate. This part, especially that near the 



