 The polar area diagram is often mistakenly credited
to Florence Nightingale, who used it to great effect to illustrate needless mortality
in the Crimean War due to unsanitary medical conditions.Nightingale most probably
got the idea from William Farr, who in turn was acquainted with Guerry's work.Guerry also resided in Beaumont-sur-Dême, where he was mayor of the village from 1846–1855.