A knowledge of the relative currents of the oceans depends to a large extent upon a knowledge of the distribution of mass. Measurements of temperature and cblorinity are made to furnish the necessary data for the computations of the density.
Hindman, J. C., L. J. Anderson, and E. G. Moberg. 1949. "A precise determination of chlorinity of sea water using the Ag-AgCl indicator electrode." Journal of Marine Research 8, (1). https://elischolar.library.yale.edu/journal_of_marine_research/702