Fig. 4—CIRRO-CUMULUS, OR SONDER CLOUD.
From the evaporation of water at the earth's surface.
375. Why do we not see them ascend?
We do, sometimes, in the form of what we call mists, but generally the vapours that rise and contribute to the formation of clouds are so thin that they are invisible.
"With clouds he covereth the light, and commandeth it not to shine by the cloud that cometh betwixt."—Job xxxvi.