LAKES AT CAPE BARNE 169 



comprising it is 18 feet below sea-level. It measures about 176 yards by GO 

 yards, and is about 2 acres in extent. Its surface was very rough, and covered by 

 a thick deposit of the prismatic or coralloidal ice, which, from the domed nature of 

 its surface, seems to have undoubtedly been formed from the conversion to ice of 

 the under side of snow-drifts. The jaresence of this prismatic ice in such large 

 quantities renders the surface of this lake comparable with that of the southern half 

 of Blue Lake, and in both cases it forms strong evidence that both Sunk Lake and 

 southern Blue Lake have not been melted to any large extent for several years. 



In the case of Sunk Lake an additional piece of evidence in favour of a long 

 period without melting is afforded by the presence of large blocks of kenyte half 

 imbedded in the lake ice. Similar boulders were observed imbedded in the ice of 

 Blue Lake. It is difficult to account for their occurrence in their present positions. 



In conclusion, we are indebted to Murray for a few isolated notes showing the 

 temperatures to which some of the water of these lakes rises during the course of 

 the summer. 



TEMPERATURE OF LAKE WATER 



Green Lake, 3ril Jaiiuai-i/ 190d +36° F. 



2nd February 1909 + 35° F. 



(It doubtless went higher, but was not visited often.) 



Coast Lake, ifh December 1908 +47° F. 



2njl January 1909 + 40° F. 



\8fh January 1909 + 4.5° F. 



Round Lair , ^th Dei-ember 1908 + .50° F. 



\Oth December 1908 +61° F. 



Fowl at Cape Dame, December 1908 + .54° F. 



