p. 173 - 179 CONSIDERATIONS SUR LA TENEUR EN Ca++, Mg++, Na+, K DES EAUX COTIERES DU LITTORAL ROUMAIN MER NOIRE Adriana Penciu et Georgeta State Institut Roumain de Recherches Marines Constantza Abstract The quantitative variational limits for the C1-, Ca++, Mg++, Na+, K+ ions in the sea waters of the Romanian Black Sea coast are reported on the basis of 1,390 samples collected along the East-Constanta and Midia profiles during 1972. Considerations on the relations existing between the major ionic constituents and the chlorine are discussed.