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Where currents converge

Columbus O’Donnell Iselin, the second director of the Woods Hole Oceanographic Institution, sees Edmund Watson and others off on a 1950 Gulf Stream cruise aboard a boat called Seal. Iselin, a physical oceanographer who first began studying the Gulf Stream in 1930, wrote a series of classical papers on the physical structure and circulation of the North Atlantic Ocean Gulf Stream. Iselin served twice as the Institution’s director — from 1940 to 1950 and from 1956 to 1958. (Photo by Clark M. Weiss, Woods Hole Oceanographic Institution)