. Annual report of the Cornell University Agricultural Experiment Station, Ithaca, Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 702 Rural Schuul Leaflet. named from the appearance they present, Some of the kinds of clouds are shown in the ilkistrations. The upper clouds are called cirrus (Fig. 37). They are white, thin, and fibrous or hair-like, which gives them the name of "; Sometimes they look like great white feathers or plumes. They are usually seen a day or two before a storm. When the storm comes nearer, the cirrus clou
. Annual report of the Cornell University Agricultural Experiment Station, Ithaca, Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 702 Rural Schuul Leaflet. named from the appearance they present, Some of the kinds of clouds are shown in the ilkistrations. The upper clouds are called cirrus (Fig. 37). They are white, thin, and fibrous or hair-like, which gives them the name of "; Sometimes they look like great white feathers or plumes. They are usually seen a day or two before a storm. When the storm comes nearer, the cirrus clouds become thicker, cover- ing the whole sky. They are then called cirro-stratus clouds. (Fig. 35). Sonietimes they form in rolls or balls, and look very much like bundles of wool. They are then called cirro-cumulus. These clouds in- dicate rain or snow within eighteen to thirty-six hours. It is the cirro- cumulus clouds that the sailors call the "mackerel sky," because the cloud-rolls or balls are said to look very much like a school of mackerel. The cumu- lus clouds are lower clouds. (Figure 38). They are usu- ally seen in the summer time before a thunder- storm, and are sometimes called " thun- ; They are thick, dense clouds with. Fig. 38.—Cumulus. great round- ed, castle-like tops and usu- ally straight bases. Stratus clouds are thick, and of a darkish gray color. Sometimes they are not much higher than the tree tops, and are usually below the tops of mountains. If you were on top of a high mountain, you could look down on the upper side of the stratus clouds. Stratus clouds are the rain-bearing clouds, but as soon as the rain begins to fall from the clouds the name changes to nimbus, (Fig. 36) the rain cloud; for the nimbus cloud is a cloud from which rain is falling. I want you to watch the clouds every day for a week. Ask your teacher to help you to learn to know them by their names. If there are any that you cannot name, write out just how
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