2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/165056The thermodynamic definition of pressure P = dU/dV is one form of the principle that in a given state, the mass in V and potential are proportional. Subject of this communication is the significance of this principle for the understanding of Cauchy stress.2 pages, no figuresGeneral Physicstext