The data about heat flow reported from the Fleischmann and Pons experiments are discussed on the basis oftopoenergetic principles concerning the behavior of composite systems. Data from the Fleischmann and Pons experiments obey the universal topoenergetic representation denoting a valid transformation process evidenced by calorimetric measurements. The probable nature of this process and the further experiments necessary for its identification are discussed by considering the composite structure of the crystalline palladium specimens responsible for its occurrence.