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PROF. EDWARD HULL_, M.A., LL.D.^ F.R.S., 



to which a vanished glacier once extended is determined hj 

 the phenomena presented by the sides of the valley which it 

 once occupied. These phenomena are chiefly of two kinds : — 

 either the surfaces of the rocks of which the valley is formed 

 are glaciated, or moraine matter with erratic boulders is found 

 resting on them. Should the sides of the valley be sufficiently 

 lofty as to have surmounted the glacier, the rocks rising above 

 the glaciated limit will be fresh and sharp, presenting no 

 evidence of ice-erosion ; nor will they be covered by morainic 

 matter or erratic blocks. The subjoined section will illustrate 

 these statements, and it is one taken at the spot where I propose 

 to measure the thickness of tlie former ice in the valley of the 

 Lake of Lucerne. (Fig. 2.) 



The section on the wall, and that also given in the paper, 

 will illustrate this more clearly. The Seelisberg Hotel stands 

 on a promontory jutting out into the valley of the Lake of 

 Lucerne at the point marked Treib.* The section Fig. 2 is taken 

 about half a mile from where the Belvue Hotel stands ; and 

 where the church is built upon a large moraine formed of gravel 

 and boulders, some of which boulders are of enormous size ; and 

 at its upper limit, which is presumed to be also the limit of the 

 former ice, the limestone rock rises in a lofty cliff', which was 

 uncovered by the ice ; in fact, there was no glacier higher than 

 that limit, as far as my knowledge extends. Those brownish 

 patches illustrate the moraine which rests upon the limestone ; 

 and below this you descend by a winding road down to that 

 point at Treib which is just where the lake makes its sharp 

 bend. The lower part of the section is a mass of bedded 

 felstone, as far as I was able to make out, and contemporaneous 

 with the formation. 



Above the point of Treib where the " Lake of the Four-forest 

 cantons" makes a sudden bend to the east, there occurs the 

 moraine above referred to, on which stands the Belvue Hotel, 

 amidst forest trees and gardens. In the background is a rampart 

 of lofty vertical cliffs of bluish limestone. The surface of the 

 moraine, although much modified by art from its original 

 rugged and broken outline, is formed of rubble, clay and gravel, 

 and is largely covered by forest trees. But from time to 

 time we meet huge blocks and boulders of granite, gneiss and 

 schists strewn in groups or separate ; some of these weighing 

 probably from 40 to 50 tons. I^one of these huge blocks 

 belong to the district: they have their source in the far off 



* The hotel directly overlooks that branch known as the Bay of Uri. 



