234 TJic American Geologist. October, i898 
inhabited condition of the country permits, by Andrew M. 
Hansen in the part of Norway southeast of the main water- 
shed of the peninsula, and by Gunnar Andersson upon an area 
of a hundred miles extent from south to north in jemtland, 
Sweden. 
Hansen notes the altitude of the Norwegian glacial lakes 
as ranging from 2,150 to 3,575 feet above the sea level, these 
bights being known by the cols of the mountain belt through 
which they outflowed; and their lengths, extending as the ice 
retreated, became for the larger lakes, according to Hansen, 
almost a hundred miles, with depths of about 1,000 feet.* 
The region of the old glacial lakes described by Anderssont 
is traversed by the railway leading from Trondhjeni east and 
south to Stockholm upon a distance of a hundred miles, from 
Annsjon (Ann lake) past the Storsjon (Great lake), to Oster- 
sund and Pilgrimstad. The Annissjon (Ann glacial or "ice" 
lake) and the Kallissjon of Andersson, outflowing through 
passes of the western watershed, are marked over large tracts 
of mountain-inclosed valleys by shore erosion and beach de- 
posits and by delta terraces, at the bights, respectively, of 
about 1,830 and 1,500 feet; and the later and considerably 
larger Naldissjon, which extended over the present area of 
the Storsjon, attained the size of about 1,700 square miles, its 
altitude, determined by a lower outlet, being about 1,350 feet 
above the sea.. The shorelines and deltas of these glacial lakes 
appear to be as well developed in many places as the parallel 
roads of Glen Roy or the beaches of lake Agassiz. The 
general prevalence of forests, however, forbids tracing the 
shores for long distances. When this shall be done at any 
future time, it seems probable that the planes of the old lakes 
will be found to have undergone differential changes of level 
in the Postglacial uplift which is known to have affected the 
whole country, although little indication of this is given by 
Andersson's maps. It is further to be remarked, also, that 
the recession of the ice border could hardly have been so 
uniform on this large district as these maps would denote; but 
*Nature, vol. XXXIII, i8£6, pp. 268, 365. 
tGeol. Survey of Sweden, Series C, No. 166, "Den Centraljamtska 
Issjon," 38 pages, with 8 figures in the text and 3 maps, 1897. 
