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Show PECULARITIES OF GLACIER ICE. Some large blocks of the glacier Ice had fallen from above and lay conveniently con-veniently for examination. While the walls of the lco caves which have been cut Into this and other glaciers prevent a perfect smooth, cont'nu-ous cont'nu-ous surfnee of clear Ice. these fragments frag-ments which had fallen from the surface sur-face exposed to the heat of the sun were, as se-en In the mass, white and opaque. When the stick was thrust I into the mass. It broke Into many-sided many-sided lumps of the rizo of tennis ball's, like assorted coal thrown fn.m a seut-te seut-te though white Instead of black. These were glacier noudlep, "grains or "Gletscher koi n.-," of which I wrote In this column a few weeks nro. The structure of the glacier Ice Is peculiar to It, and Is only made evident evi-dent where tho sun's rays penetrate It and me t the lens pure Ice which holds together the crystalline nodule. nodu-le. According to Dr. J. Young Burba-nan, Burba-nan, those nodules are masses of the' crystals comparafvely free from mineral min-eral matter, while the water around them, which freezes lesH readily, contains con-tains mineral impurities in solution. The prerenee of saline matter In so lutlon lowers. In proportion lo Its amount, the freezing point of water Accordingly, although frozen Into one' j solid mns with the nodules, the ce-mentlr.g ce-mentlr.g ire melts under tho bent of the penetrating rays of the sun soon- I er that. Is, at a low temperature then do the pure crystalline modules, allows them to separate. It is owing to this that the exposed surfaco of glacier ice Is white and powdery dls-integrated dls-integrated by the tuperlleial heat and forming a rough surface, on which one can safely walk. Lake ice does not , break up in this manner under the sun's rays, but an It melts retains Its smooth. rMppery surface. It Is formed form-ed in water, and not from the cementing cement-ing and regelatlon of the powdery crystalline snow. as Is glacier Ice Sir Ray Lancaster In the London Telegraph. |