In this role, he was involved in the German campaign under General Jean Victor Marie Moreau (1763-1813).
Afterwards, he left the army and relocated to Bern, where he developed an interest in botany.
He started to edit exsiccatae distributing specimens in sets, among others Saules de la Suisse (1805–1814) and Collection des familles algues, champignons, hypoxylons, lichens (1809).
Among his written efforts were an 1815 monograph on willows native to Switzerland, a treatise on Swiss cereal grains titled "Monographie des céréales de la Suisse" (1818) and a work on cereal grains of Europe called "Descriptions et figures des céréales européennes" (1841).
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