“…Cluster states and more complex patterns are observed when more than three inner containers are held within one outer container (Miyakawa and Yamada, 2001). The oscillation of the electrical potential, which occurs when a pair of electrodes are placed in the light and heavy fluids, has also been extensively studied (Yoshikawa et al, 1989;Adamčiková, 1992;Upadhyay et al, 1992;Das and Srivastava, 1993;Srivastava, 1994;Srivastava et al, 1994;Villarreyes et al, 2000;Cervellati and Solda, 2001;Rastogi et al, 2005). The oscillation of the electrical potential, which occurs when a pair of electrodes are placed in the light and heavy fluids, has also been extensively studied (Yoshikawa et al, 1989;Adamčiková, 1992;Upadhyay et al, 1992;Das and Srivastava, 1993;Srivastava, 1994;Srivastava et al, 1994;Villarreyes et al, 2000;Cervellati and Solda, 2001;Rastogi et al, 2005).…”