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 tried off Cape Ferrat, France, in between 200 and 400 meters water depth.
Photo Category: Oceanography - Historical instruments
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|Added On||18th October 2015|