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![Figure 4 ship4457.jpg Figure 4](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4457.jpg?itok=5uQDjNKV)
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Figure 4. Li-Cor photometer. This photometer was investigated by Dr. JeanBrouardel in 1974 in a quest for instruments of greater precision. Heinvestigated several including a Li-Cor quantum/radiometer/photometer developedby industry especially for measuring light in water or in air in relation tophotosynthesis. Construction date and details of study conditions are unknown. (Image credit: Oceanographic Museum of Monaco | Y. Berard)