As on Spitzbergen the ice-field here is doubtless interrupted by deep bottomless clefts, over which the snowstorms of winter throw fragile snow-bridges, which conceal the openings of the abysses so completely that one may stand close to their edge without having any suspicion that a step further is certain death to the man, who, without observing the usual precaution of being bound by a rope to his companions, seeks his way over the blinding-white, almost velvet-like, surface of this snow-field, hard packed indeed, but bound together by no firm crust. If a man, after taking necessary precautions against the danger of tumbling down into these crevasses, betakes himself farther into the country in the hope that the apparently even surface of the snow will allow of long day's marches, he is soon disappointed in his expectations; for he comes to regions where the ice is everywhere crossed by narrow depressions, _canals_, bounded by dangerous clefts, with perpendicular walls up to fifteen metres in height. One can cross these depressions only alter endless zigzag wanderings, at places where they have become filled with snow and thereby passable. In summer again, when the snow has melted, the surface of the ice-wilderness has quite a different appearance. The snow has disappeared and the ground is now formed of a blue ice, which however is not clean, but everywhere rendered dirty by a grey argillaceous dust, carried to the surface of the glacier by wind and rain, probably from distant mountain heights. Among this clay, and even directly on the ice itself, there is a scanty covering of low vegetable organisms. The ice-deserts of the Polar lands are thus the habitat of a peculiar flora, which, insignificant as it appears to be, forms however an important condition for the issue of the conflict which goes on here, year after year, century after century, between the sun and the ice. For the dark clay and the dark parts of plants absorb the warm rays of the sun better than the ice, and therefore powerfully promote its melting. They eat themselves down in perpendicular cylindrical holes thirty to sixty centimetres in depth, and from a few millimetres to a whole metre in diameter. The surface of the ice is thus destroyed and broken up. [Illustration: VIEW FROM THE INLAND-ICE OF GREENLAND. After a drawing by S. Berggren, 23rd July, 1870. ] [Illustration: GREENLAND ICE FJORD. After a design drawn and lithographed by a Greenland Eskimo. ] [Illustration: SLOWLY-ADVANCING GLACIER. At Foul Bay, on the west coast of Spitzbergen, after a photograph taken by A. Envall, 30th August, 1872. ] [Illustration: GLACIER WITH STATIONARY FRONT. Udde Bay, on Novaya Zemlya, after a drawing by Hj. Theel (1875). ]