pl23_ship4021.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23ship4021jpgDescription
Figure 18. Color measuring scale of Francoise-Alphonse Forel. Forel inventedthis scale in 1887 for the study of the color of water, and precisely for thatof Lake Leman. He conducted his first experiments in Lake Leman in 1887.
Credit
Oceanographic Museum of Monaco
Photographer
P. Roggero
Collection
Voyage to Inner Space
History of Oceanography Collection
The Early Instruments - Collections of the Oceanographic Museum at Monaco
Photometers
Keywords
Oceanography
Historical instruments