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Author: Francis Amasa Walker (1840-1897)
Age pyramid (bilateral histogram), bilateral frequency polygon, and the use of subdivided squares to show the division of population by two variables jointly (an early mosaic display) in the first true U.S. national statistical atlas
Mediaitems: Cover of the 1870 Statistical Atlas, Population pyramid, Portrait, Walker portrait, detailed Walker biography, Text of the Statistical Atlas of 1870, History of US census atlases, Detailed Walker biography, Statistical Atlas of the United States (1870), Population distribution of U.S. by age and sex, Example of population pyramid
Category: Statistics & Graphics