. The Arctic world: its plants, animals and natural phenomena [microform] : with a historical sketch of Arctic discovery down to the British Polar Expedition: 1875-76. British Polar Expedition, 1875-76; British Polar Expedition, 1875-76; Zoology; Zoologie. 112 CHARACTKRS OF GLACIFK-ICE. coiuiition of continuity. A snowball may thus bn converted into a sphere of ico, anil the sphoro, by constant pressure, into a cup or a statue. Professor Tyndall refers to a remarkable instance of re{,'elation which he observed one day in early sprin;,'. A layer of snow, not quite two inches thick, had fallen o
. The Arctic world: its plants, animals and natural phenomena [microform] : with a historical sketch of Arctic discovery down to the British Polar Expedition: 1875-76. British Polar Expedition, 1875-76; British Polar Expedition, 1875-76; Zoology; Zoologie. 112 CHARACTKRS OF GLACIFK-ICE. coiuiition of continuity. A snowball may thus bn converted into a sphere of ico, anil the sphoro, by constant pressure, into a cup or a statue. Professor Tyndall refers to a remarkable instance of re{,'elation which he observed one day in early sprin;,'. A layer of snow, not quite two inches thick, had fallen on the glass roof of a small conservatory, and the internal air, warming the panes, had melted the sn so far as it was in im- mediate contact with them. I'lie enJre layer had slipped down the pane, and projected beyond the edge of the roof, without falling, and had bent and curved as required, just like a flexible --^^f<i^.'^^-'^-^, 1.^,^. MOULDINO ICK. The snow-fields which overspread the upper part of every glacier, whothoi in the Arctic Regions or elsewhere, are composed of crystallized snow, whose fragile, delicate, and fairy-like architecture endures so long as it remains dry, but undergoes a great transformation when the sun, melting the upper stratum, allows the water to interpene- trate its substance. The fluid, congealing anew during the night, transforms the snow into the condition technically known as neve; a terra given by the Swiss physicists to a granular mass composed of small rounded icicles, disaggregated, but more adhesive than snow-flakes, and of a density intermediate between that of sn w and that of ice. Under the pressure of new layers, and as a result of infiltrations of \\ii\ the nev4 imites, and solders into ice of constantly increasing compactness. But glacier-ice presents some other curious peculiarities. Every abundant snowfall on the summit of the mountains forms a layer easily distinguishable from preceding layers—which, in most cases, h
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1876
