We feel a similar need in the case of mountains. Besides the bare statement of figures, it is necessary to have some means for grasping the meaning of the figures. The bare tens and thousands must be clothed with some concrete images. The statement that a mountain is 15,000 feet high is, by itself, little more impressive, than that it is 3,000; we want something more before we can mentally compare Mont Blanc and Snowdon. Indeed, the same people who guess of a mountain's height at a number of feet much exceeding the reality, show, when they are cross-examined, that they fail to appreciate in any tolerable degree the real meaning of the figures. An old lady one day, about 11 A.M., proposed to walk from the Aeggischhorn to the Jungfrau-Joch, and to return for luncheon--the distance being a good twelve hours' journey for trained mountaineers. Every detail of which the huge mass is composed is certain to be underestimated. A gentleman the other day pointed out to me a grand ice-cliff at the end of a hanging glacier, which must have been at least 100 feet high, and asked me whether that snow was three feet deep. Nothing is more common than for tourists to mistake some huge pinnacle of rock, as big as a church tower, for a traveller. The rocks of the Grands Mulets, in one corner of which the châlet is hidden, are often identified with a party ascending Mont Blanc; and I have seen boulders as big as a house pointed out confidently as chamois. People who make these blunders must evidently see the mountains as mere toys, however many feet they may give them at a random guess. Huge overhanging cliffs are to them steps within the reach of human legs; yawning crevasses are ditches to be jumped; and foaming waterfalls are like streams from penny squirts. Everyone knows the avalanches on the Jungfrau, and the curiously disproportionate appearance of the little puffs of white smoke, which are said to be the cause of the thunder; but the disproportion ceases to an eye that has learnt really to measure distance, and to know that these smoke-puffs, represent a cataract of crashing blocks of ice.