[Augustin Delondre and Friedrich AuguIst Flückiger : an unpublished correspondence 1868-1869].

This article describes an unpublished correspondence between Augustin-Ambroise Delondre (1823- 1879), son of the famous pharmacist Augustin - Pierre Delondre and Friedrich August Flückiger, Swiss pharmacist (1828-1894), professor between 1873 to 1892 of the Chair in pharmacy at the university of Strasbourg and considered as the father of pharmacognosy. This set of 9 unique hand- written letters (1868 and 1869) allows to have an clearer idea of their scientific and human relations.