52 
IOWA ACADEMY OF SCIENCE Vot. XXVII, 1920 
Fig. 1. Fodge Pole Pine and L,ake, Milner Pass, Colorado. Specimen Mountain to 
the left not visible 
the same width. The crevasses range in width from a few inches 
to several feet. Professor G. B. MacDonald, who visited the 
glacier in 1919, tells us that the crevasses are of unknown depth. 
It is said to move from fourteen to twenty-seven feet a year. 
The rate of movement of this glacier has been studied by Hen- 
derson,^ who found in 1905 that the ice suddenly receded, but 
that in 1903 and 1904 it moved forward. 
The Hallet glacier is a little farther north and has also dimin- 
ished during the last nine years. 
The Arapahoe national forest and the Rocky Mountain nation- 
al park take in the continental divide, and are generally west of 
the Clear creek region and west of the Boulder canyon country. 
In this region are some magnificent peaks; the Arapahoe peak 
13,506 feet, James peak 13,260 feet and to the southwest Parry 
peak 13,345 feet, Mount Eva 13,115 feet and Mount Flora 
13,122 feet, Torrey peak 14,372 feet and Gray peak 14,384 feet. 
The magnificent botanical peaks, James, Parry, Torrey and Gray, 
are thus not widely separated. Dr. C. C. Parry® in 1861 applied 
the names; “Torrey and Gray to the twin peaks always visible 
from a conspicuous place and to the associate peak somewhat 
lower. Mount Engelmann. In these words I have endeavored to 
commemorate the joint scientific services of our triad of North 
2 Journal of Geology, 13:556; 13:317.^ 
3 Physiograpnical sketch of that portion of the Rocky Mountain range, at the 
headwaters of South Clear Creek and Fast of Middlepark, with an enumeration of 
the plants collected in this district, in the summer months of 1861: Am. Jour. Sci., 
2 Ser. 33:231, see p. 235. 
