The author has studied two of the chemical ingredients of inlet water, calcium and magnesium, and tried to see the variation they show according to the difference in characteristics of various inlets.
1. The chemical composition of inlet water is subject to variation according to the features of different inlets, and the variation is regular in each inlet.
2. In the water of such inlets as are noticeably diluted by land water, a great variation is caused by the difference in hydrographic conditions.
3. In stable and stagnant inlets, Mg/Cl is more remarkable than Ca/Cl as the indicator element of a water mass.
4. The chemical composition of sea water in inlets varies according to the chemical elements and the state of mixing of different water masses.