pl23_ship4018.jpg
![Figure 15 ship4018.jpg Figure 15](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4018.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23ship4018jpgDescription
Figure 15. K. Grein's photometer invented and made by Klaus Green in 1912 aspart of a series of photometers devised in collaboration with Wolfgang Ewald.This instrument was first tested from the EIDER in 1913 between 500meters water depth. As a result of these tests, Grein began studies of thepenetration of ultra-violet light into the sea.
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