it was entrusted to a general director, the most famous one being Albrecht von Haller.

To provide wood for the salt works in Roche, in 1695 a forest was planted in the Joux Verte gorge. Starting in the 16th century, natural evaporation was replaced by boiling to speed up salt production. The first tunnels were dug in 1684 to find new salt sources. Salt deposits were discovered in Le Bévieux and Les Devens (both part of the municipality of Bex) and Aigle. The mine at Le Bévieux was still