Surface wave propagation on agarose gels was studied by measuring the veloc
ity of mechanically excited pulsed waves around sol-gel transition temperat
ure. Two independent modes were clearly observed in the gel state. The velo
cities of the two modes were successfully fitted to the theoretical calcula
tion of pseudocapillary and Rayleigh modes which were predicted by Onodera
and Choi. (C) 1999 Acoustical Society of America. [S0001-4966(99)01309-0].