Henri Duvoisin (1850–1918) [1]
Duvoisin, a native of Vaud, studied in Le Locle and became a mathematics teacher at the Progymnasium in Delémont in 1872. From 1874 to 1887 he was in its directorate. Afterwards he was appointed director of the teachers’ seminary in Delémont.
[1] This article bases on Mair, Toni. Grieder, Susanne. Das Landschaftsrelief – Symbiose von Wissenschaft und Kunsthandwerk. Mit Schweizer Reliefkatalog. Verlag hier+jetzt. Baden, Schweiz. 2006. S.157.