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Measurement of Submarine Daylight


SUBMARINE measurements of solar radiation are of interest to oceanographers, who are concerned with such problems as the rate of rise of temperature of the water, the rate of photosynthesis, the movements of zooplankton, or the depth limits of daylight vision for fish. They also enable us to measure the opacity of the water, which, being an index of the amount of matter in suspension, may give valuable evidence as to its previous history, and is likely to be of importance in connexion with the nutrition and migration of fish.

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