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The Glaciers

into the verdant valleys, rich with foliage and cultivation. The inferior ranges of mountains, next the central, present the same appearance in a less degree; but in those more remote, the snow and ice are confined to the most elevated points; and others, still further removed, are covered with grass and plants, which, in their turn, give place to such hills and valleys as are common in any part of the world.

Mr. Coxe divides the glaciers, in the above general survey, into two classes: the first occupy the deep valleys situated in the bosom of the Alps, and the second adhere to the sides and summits of the mountains. Those in the valleys are far more extensive than the upper glaciers; some are several leagues in length; and that of Des Bois is three miles broad and fifteen long: but they do not communicate with each other, and there are few parallel to the central chain; their upper extremities are connected with inaccessible precipices, and the lower proceed, as already mentioned, quite into the vales. The depth of these astonishing accumulations of frozen fluid vary from eighty to six hundred feet, and they generally rest on an inclined plane, where, urged forward by their own enormous weight, and but weakly supported by the pointed rocks inserted in their bases, they are universally intersected by yawning chasms, of dreadful aspect to the curious investigator, who beholds fanciful representations of walls, towers, and pyramids, on every side of him; but upon reaching those parts where the glacier rests upon an horizontal plane, his progress is seldom impeded by considerable fissures, and he walks in safety over a surface nearly uniform, and not so perfectly polished as that of ponds and rivers suddenly and violently frozen. weight, The absence of transparency, the various marks of airbubbles, and the general roughness, so perfectly resemble the congelation of snow when half restored to fluidity, that M. de Saussure was immediately led to form the following probable theory of the formation of the glaciers Snow is constantly accumulating in the recesses or depths of the mountains, during nine months of the year, by the usual fall of moisture, and the descent of vast masses, borne down by their weight, from the precipices and crags above. Part of this is necessarily reduced to water by slight thaws and casual rains, and, being frozen in this state, the glacier is composed of a porous opaque ice.

The upper glaciers Mr. Coxe subdivides into those which cover the summits, and those which extend along the sides of the Alps; the former originate from the snow frequently fallng and congealing into a firm body, though not becoming ctual ice, which the brilliancy of the projections has induced me philosophers to suppose it to be. M. de Saussure, having explored Mont Blanc, ascertained that the top was encrusted with ice, (which might be penetrated by a stick,) covering a mass of snow on the declivities, so chilled and dry as to be incapable of coherence.

The sides of the Alps support a congelation of half-dissolved snow, which is different from the pure snow of the summits, and the ice of the lower glaciers. Two causes operate to produce this effect; the first is the descent of water from the higher regions, where a dissolution of snow sometimes occurs; and the second arises from the more favourable situation of these parts for reflecting the rays of the sun, and the consequent melting of the snow. From hence downwards, the ice adhering to the cavities becomes gradually more solid by the freezing of the snow-water, then nearly divested of that air which in the less dissolved portions renders the ice, formed from it, porous, opaque, and full of bubbles.

An idea of the sublimity of the glaciers may be formed by reading the account of M. Bourrit, who appears to have viewed and described them with all that enthusiasm which such splendid objects must have inspired.-" To come at this collected mass of ice, (Des Bois,) we crossed the Arve, and travelling in a tolerable road, passed some villages or hamlets, whose inhabitants behaved with much politeness; they invited us to go in and rest ourselves, apologized for our reception, and offered us a taste of their honey. After amusing ourselves some time amongst them, we resumed our road, and entered a beautiful wood of lofty firs, inhabited by squirrels. The bottom is a fine sand, left there by the inundations of the Arveron; it is a very agreeable walk, and exhibits some extraordinary appearances. In proportion as we advanced into this wood, we observed the objects gradually to vanish from our sight; surprised at this circumstance, we were earnest to discover the cause, and our eyes sought in vain for satisfaction, till, having passed through it, the charm ceased. Judge of our astonishment, when we saw before us an enormous mass of ice, twenty times as large as the front of our cathedral of St. Peter, and so constructed, that we have only to change our situation to make it resemble whatever we please. It is a magnificent palace, cased over with the purest crystal; a majestic temple, ornamented with a portico; and columns of several shapes and colours; it has the appearance of a fortress, flanked with towers and bastions to the right and left; and at the bottom is a grotto, terminating in a dome of bold construction. This fairy dwelling, this enchanted residence, or cave of fancy, is the source of the Arveron, and of the gold which is found in the Arve. And if we add to all this rich variety, the ringing tinkling sound of water dropping