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First known tornado cloud to be pho-tographed (Miner County, South Dakota, 28 August 1884). More South-erners than Northerners are killed by tornadoes, a fact that may be releated to differences in psychology. See page 1386. [Library of Congress; obtained from U.S. Weather Bureau; the photograph was probably taken by F. N. Robinson]


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Science. ISSN 0036-8075 (print), 1095-9203 (online)