Abstract
This work was done as a fundamental investigation to obtain data required for the improvement of the salt field. It is obviously advisable that the sea water of which salt content is nearly of the highest degree is to be used at the field. In this work it was cleared that the chlor content in water is different according to the condition and position of water:-the sea water in “Mis”-the cannals between fields, the sea water at the ebb-tide or at the high tide, the underground water at the fields.