pl23_ship4015.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23ship4015jpgDescription
Figure 13. (cont) R. Bertel's spectograph. Left: exposure mechanism beforeopening. Middle: Exposure mechanism during opening. Right: Exposure mechanismafter closure. See image ship4014 for further discussion.
Credit
Oceanographic Museum of Monaco
Photographer
Y. Berard
Collection
Voyage to Inner Space
History of Oceanography Collection
The Early Instruments - Collections of the Oceanographic Museum at Monaco
Photometers
Keywords
Oceanography
Historical instruments