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NOAA Photo Library Image - ship4018

Figure 15. K. Grein's photometer invented and made by Klaus Green in 1912 as part of a series of photometers devised in collaboration with Wolfgang Ewald. This instrument was first tested from the EIDER in 1913 between 500 meters water depth. As a result of these tests, Grein began studies of the penetration of ultra-violet light into the sea.

Image ID: ship4018, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Photographer: P. Roggero
Credit: Oceanographic Museum of Monaco

Category: Oceanography/Historical instruments/

High Resolution Photo Available





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Last Updated:
May 12, 2014