trial_description_8:
Part of bottom and one vertical edge preserved. Hydraulic cement on both faces, though on one face only faint traces remain. A little water deposit toward the bottom on one face. At one end a half housing joint for junction with another slab. Trace of mortise in top of slab. From Klepsydra.
Made of fine-grained granular brown poros like that in the lining of the vertical shaft.
ADDENDA From wall of central tank (F.C., 25 July, 1974).