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Portrait of Marston Sargent (1906-1986), who was associated with Scripps Institution of Oceanography for more than 40 years. During which time he primarily investigated photosynthesis and the growth requirements of marine planktonic algae. He also served as the CalCOFI Coordinator from 1971-74. Under his guidance, CalCOFI began its longstanding and fruitful relationship with Mexico. Circa 1935.