pl23_ship4022.jpg
![Figure 19 ship4022.jpg Figure 19](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4022.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23ship4022jpgDescription
Figure 19. Color measuring tube of Julien Thoulet, designed about 1903 to facilitate the use of Forel's color scale. It was only a little more practical than the original form.
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