364 J. D. Dana—Flood of the. ConnecticutRiver Valley. 
ane several. hundred wide, and leaving outside only a fringe of 
ords and islands generally but 30 to 60 miles in width,—-we. 
ae derive many facts illustrating this subject. We learn from 
it that a continental glacier (1 would have crevasses of indefi- 
nite number and extent, either transverse to the direction of 
motion, longitudinal, or radial, according to the bottom over 
which it moved and the atten dant conditions ; that (2) it would 
be covered Macmucuns in the warmer season at least, with fresh- 
s 2,200 0 sho the mean slope of the ice-surface on ved rite as deduced 
from the heigh as 0° 26’, equivalent to 40 feet per mile (1: 
uieut. fae se the i mit of his inland ice set of 474 ee from he foot of 
the Frederi shaab glacier, reached a clu-ter of ae peaks, rising from beneath 
the glacier— Nunat eee of the Greenlanders (J. N., 1). The Rhee pris a 
sea of the four largest were severally. commencing ve the north, 5,623 (g), 5,1 
(7), 5,654 (k), and 5,580 (m), feet. (See fig. 2 be low .) From these doaks hich 
stand like islands in the sea of ice, moraines of stones and earth (some of the 
stones 20 feet in their Siaanelcns) extend af = to 24 miles, (m’, m’”, m’’’, m’?”", 
2) and di ist, by the aid of the 
re winds, is drifted off for wide 
oe 
~ 
. distribution over the gla ier. The 
ter a short outside ex- 
istence, disappeared poco = 
, the stones dropping down 
crevasses that were from 
1e opening (the account says) as 
th cier mo on - 
ing direction of the moraines, and 
the eddies in the flowing i 
he obstructing ridge (of which 
the Nunataks are the peaks 
hese directions indicate, are r 
markably instructive. The arrows 
how the inferred direction of move 
he aine m’, 2 
Co) made mostly of polished 
stones, which appear therefore to 
have led far, a be 
the debris of the nunataks. @ 
?’ have no conpe eae 
with any ne nunatak. <A 
a lake 824 feet in diameter, wea 
toward it the ie slo 
from a height of 4,900 feet to that 
.120 on its bo A gla- 
eler had a height at ft, a - — pogsesiree of 5,150 feet. The slope of the ice- 
surface for the distance d 0° 49’, or about 75 feet per mile 
(1 £10); ruil re was ev nina nt the Seeeene of the glacier depended on this 
slope. Crevasses were num niet along the route transverse to t the line of move- 
ment as well as i age ati Liosngn (see fine lines ts the route on fig. 1); 
and fresh-water streams were ¢ on, and water-falls 
The largest of Jensen’s naa consisted mostly of omblende schist in bold 
flexures, with mica schist and a Twenty-seven species nts were col- 
lected from them by Mr. Korn ge among these were ee poate Lazule, 
pind "ea, and phe nar Asie widely read, 7i ee subspi nd Poa tricho- 
ia digy the white-flowering Cerastivm 
eae a Sueifaga oppositifolia ; ; the little ‘hve stowering Campanula unifiora ; 
tilia n ‘anuneulus meus, Silene acaulis, Cassiope hypnoides, Armeria 
Pe 
chs ica ; ney the yellow-flowering poppy, Papaver rudioanle, which was taken 
