Abstract
The temperature dependency of surface tension of aqueous solutions of some alcohol such as butanol behaves in a nonlinear manner. Namely, the value of surface tension increases from some temperature when the solution is heated. In this study the author reports new measurement results about the nonlinearity of temperature dependency of the surface tension of the butanol aqueous solutions. The measurement again revealed that the value of the surface tension of the butanol aqueous solution increased above some minimum temperature as the temperature was gradually increased. Moreover, as the concentration decreased, the minimum temperature gradually decreased.
