National Geographic : 1925 Aug
Photograph by F. Ellerman TUFTED CIRRUS These dainty and exquisite wisps of cloud are the most ethereal of the vapor creations of the sky. This and the following fifteen plates are from photographs selected by the United States Weather Bureau to represent the types of clouds indicated. Photograph by A. J . Weed CIRRUS: A FIBROUS FORM Whether it shows itself as faint wisps, long fibers, or dense bunches, cirrus has a character istic delicacy, especially about the edges, which makes its identification relatively easy. This is because cirrus is almost always a frozen cloud, made up of tiny ice spicules and prisms-fairy needles so fine that only Titania, in a domestic mood, might wield them.