Abstract
In this paper, examination thermodynamic about the geometric form of the surface under gravitational attraction was performed. First, the conventional method based on a Laplace equation was reconsidered, and the point in question accepted from a viewpoint of continuum mechanics was clarified to how to catch the pressure of a liquid and gas. Such a problem did not arise in the thermodynamic approach, but the result containing the conventional result according to a Laplace equation was obtained.
