Here we rested until I took a few angles and bearings of the most prominent parts of the coast, when, having collected specimens of the minerals, and such few plants as the barren ridge afforded, we proceeded on our excursion. In our way to the principal mountain near us, we passed along a ridge of the secondary mountains, which was so acute that I sat across it with a leg on each side as on horseback. To the very top it consisted of loose sharp limestones, of a yellowish or reddish colour, smaller in size than the stones generally used for repairing high roads, few pieces being above a pound in weight. The fracture appeared rather fresh. After passing along this ridge about three or four furlongs, and crossing a lodgment of ice and snow, we descended by a sort of ravine to the side of the principal mountain, which arose with a uniformly steep ascent, similar to that we had already surmounted, to the very summit. The ascent was now even more difficult than before; we could make no considerable progress, but by the exertion of leaping and running, so that we were obliged to rest after every fifty or sixty paces. No solid rock was met with, and no earth or soil. The stones, however, were larger, appeared more decayed, and were more uniformly covered with black lichens; but several plants of the _Saxifraga_, _Salix_, _Draba_, _Cochlearia_, and _Juncus genera_, which had been met with here and there for the first two thousand feet of elevation, began to disappear as we approached the summit. The invariably broken state of the rocks appeared to have been the effect of frost. On calcareous rocks, some of which are not impervious to moisture, the effect is such as might be expected; but how frost can operate in this way on quartz is not so easily understood. As we completed the arduous ascent, the sun had just reached the meridian below the Pole, and still shed his reviving rays of unimpaired brilliancy on a small surface of snow, which capped the mountain summit. A thermometer, placed among stones in the shade of the brow of the hill, indicated a temperature as high as 37°. At the top of the first hill, the temperature was 42°; and at the foot, on the plain, 44° to 46°; so that, at the very peak of the mountain, estimated at three thousand feet elevation, the power of the sun at midnight produced a temperature several degrees above the freezing point, and occasioned the discharge of streams of water from the snow-capped summit. In Spitzbergen, the frost relaxes in the months of July and August, and the thawing temperature prevails for considerable intervals on the greatest heights that have been visited.