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very remarkable feature about this range, and that is the 

 superficial covering of earth which reaches clear to the 

 summits of many of the peaks. About the middle portion of 

 the range are situated the three prominent peaks of Prince- 

 ton, Yale, and Harvard; respectively, 14,208; 14,187, 14,375 

 feet above the level of the sea. 



Its companion, the Park Range, is very irregular in height, 

 being much cut to pieces by erosion. One of its marked fea- 

 tures are the trachytic beds which are interstratified among 

 its other rocks ; these layers have, in places, a thickness of 

 1000 feet. Another peculiarity is the presence of the large 

 amphitheatres at the head ol the streams which arise on its 

 eastern slope. It is very precipitous on the western side, its 

 gentle inclination to the east giving rise to the supposition of 

 its being an anticlinal. 



Little remains for us to do now but to glance at that knot 

 of mountains which centre in Mt. Gray, forming a connecting 

 link between the Front and Park Ranges, two of whose 

 peaks we measured : Mts. Evans and Silverheels. As the 

 main crest of the Front Range approaches Mt. Torrey, it 

 suddenly rises from its usual height of about 12,000 feet to 

 .the magnificent elevation of over 14,350 feet. From Mts. 

 Gray and Torrey a very imposing and high ridge runs 

 out to the east, which reaches its climax in Mt. Evans. 

 From Mt. Gray the Range to near Mt. Lin'coln is much 

 higher than in any other part. We crossed the Argentine 

 Pass at 13,100 feet, and the Hoosier Pass at 12,364 feet. Mt. 

 Silverheels is on this ridge just before it reaches Hoosipr 

 Pass, and is also the centre of another group of mountains. 

 It might be said that the main ridge reaches here its maxi- 

 mum height, for a pass at this point is 13,650 feet. Near Mt 

 Lincoln the main ridge meets the Park Range at right angles, 

 and we shall leave it at this point to follow the Park Range 

 far enough to mention the three mountains we measured on 

 its crest. The Park Range has four mountains at this point, all 

 within a short distance of each other, which are above 14,000 

 feet; of these we measured three: Mts. Quandary, Lincoln 

 and Bross. It is also noted for its high passes, the number of 

 its peaks, and the amphitheatres at the heads of the several 

 valleys. This brings us to the end of our work in Colorado. 



