Extent and typical character of the central cloud region.

We have next to investigate the character of the Central Cloud Region, which I consider as including all clouds which are the usual characteristic of ordinary serene weather, and which touch and envelope the mountains of Switzerland, but never affect those of our own island; they may therefore be considered as occupying a space of air ten thousand feet in height, extending from five to fifteen thousand feet above the sea.

These clouds, according to their elevation, appear with great variety of form, often partaking of the streaked or mottled character of the higher region, and as often, when the precursors of storm, manifesting forms closely connected with the lowest rain-clouds; but the species especially characteristic of the central region is a white, ragged, irregular, and scattered vapour, which has little form and less colour, and of which a good example may be seen in the largest landscape of Cuyp in the Dulwich Gallery. When this vapour collects into masses, it is partially rounded, clumsy, and ponderous, as if it would tumble out of the sky, shaded with a dull grey, and totally devoid of any appearance of energy or motion. Even in nature, these clouds are comparatively uninteresting, scarcely worth raising our heads to look at; and, on canvas, valuable only as a means of introducing light, and breaking the monotony of blue; yet they are, perhaps, beyond all others the favourite clouds of the Dutch masters.