Figure 2. H. Fol and E. Sarasin photometer, 1884 model. Left: device closed.Right: Device opened. This instrument was used in 1885 to study the penetration of light in Lake Leman and after that in the Mediterranean. It was triedoff Cape Ferrat, F
4/4/2019 1:50:11 PM
Photographer: Y. Berard
Credit: Oceanographic Museum of Monaco
Subject: Oceanography
Subject: Historical instruments