“Above our heads the sky, perfectly clear, presents no unusual appearance; the sun shines there in all its brilliancy. Down there at our feet, almost in the plains, white clouds spread themselves out. The wind sweeps them before it and drives them toward the summit. There they are, rolling and mounting up the side of the mountain. One would think they were immense flocks of cotton pushed up the slope by some invisible hand. Now and then a ray of sunlight penetrates their depths and gives them the brilliancy of gold and fire. The beautiful clouds behind which the sun disappears at its setting are not richer. What brilliant tints, what soft suppleness! They mount higher and higher. Now they roll up like a shining white band around the top of the mountain, and hide the view of the plain from us. Only the point where we are projects above the cloud-curtain, like an islet above the sea. At last this point is invaded, we are in the bosom of the clouds. Warm tints, soft outlines, striking views—all have disappeared. It is now only a dark fog that saturates with moisture and makes us feel depressed. Ah, if some breath of wind would make haste and sweep away these disagreeable clouds! “That, my little friends, is what one does not fail to wish when one is in the clouds, which, so beautiful at a distance, are nothing but gloomy fog when close at hand. The spectacle of the clouds should be seen from afar. When in our curiosity we wish to examine certain appearances too closely, we sometimes find them deceptive; but we also find that, under a secondary brilliancy, which serves to adorn the earth, they hide realities of the first importance. The marvels of the clouds are only an appearance, an illusion of light; but under this illusion are concealed the reservoirs of rain, source of the earth’s fecundity. God, by whom the smallest details of creation have been ordered, willed that the most common but also most necessary substances should serve as an ornament to the earth in spite of their really humble aspect; and he clothes them with a prestige dependent on the distance from which we are to contemplate them. The gray vapor of the clouds gives us rain. That is its chief utility. The sun illuminates it, and that suffices to transform it into a celestial tapestry in which the astonished eye finds the splendor of purple, gold and fire. That is its ornamental function. [Illustration: Cirrus] “The height maintained by clouds is very variable and is generally less than you might suppose. There are clouds that lazily trail along the ground; they are the fogs. There are others that cling to the sides of moderately high mountains, and still others that crown the summits. The region where they are commonly found is at a height varying from 500 to 1500 meters. In some rather rare instances they rise to nearly four leagues. Beyond that eternal serenity reigns; clouds never mount there, thunder never rumbles, and snow, hail, and rain never form.