Henri Dagonet

Henri Dagonet (3 February 1823 in Châlons-sur-Marne – 4 September 1902 in Paris) was a French psychiatrist.

In 1849, he received his medical doctorate and, during the following year, became superintendent at the Stéphansfeld asylum. From 1854, he was a professeur agrégé at Strasbourg, relocating to Paris in 1867, where he was appointed superintendent of the Sainte-Anne asylum. During his long career at Sainte-Anne, he worked with Prosper Lucas (1805–1885), Valentin Magnan (1835–1916) and Gustave Bouchereau (1835–1900). In 1885, he was president of the Société Médico-Psychologique.

In 1862, he published Traité élémentaire et pratique des maladies mentales, with further editions in 1876 and 1894 as * Nouveau traité élémentaire et pratique des maladies mentales*. The second edition (1876) is recognized as the first medical textbook to use photographic illustration of patients. The book contains eight Woodburytype plates depicting 33 "types of insanity".