Word: cumulus
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Dates: during 1890-1899
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...very fine series of cloud views taken from photographs. Clouds, said Mr. Ward, are formed by the cooling and condensation of vapor in the air. There are three different types which are classified roughly into three kinds, the cirrus, characterized by its swift motion and feathery appearance; the cumulus, composed of round heaped-up masses; and the stratus, or low ground clouds, such as rise from valleys at night...