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Main tain ing min i mum depth in con ven tional ba sin type so lar still is dif fi cult, as the area is large. How ever this can be achieved in stepped so lar still in which the area of the ba sin is min i mized by hav ing small trays. Very few works have been car ried so far in stepped so lar still and con stant depth trays are used in the ba sin plate. In this work, a stepped still with two dif fer ent depth of trays are used. The ba sin plate con tains twenty five trays with 10 mm depth anddoi:10.2298/tsci0803153v fatcat:zij56uswi5e4pme3lva4yupedm