At Besancon , he also served as director of its botanical garden .
From 1892 he was a professor of agricultural botany at the faculty of sciences of Besancon , where he taught classes up until 1930 .
At Besancon , professor also served as director of its botanical garden .
From 1892 he was a professor of agricultural botany at the faculty of sciences of Besancon , where he taught classes up until 1930 .