In conclusion, “fundamental phrenological analysis” must be reconstructed. From Gall, Comte only preserves “the impulsion.” The greater part of the localisations which Gall thought right to establish must be abandoned. But he was right in searching for them, for thus he showed science the path to be followed. Even an erroneous hypothesis on positive lines is always a service rendered in the beginnings of a science. But of Gall’s doctrine only two principles henceforth indisputable subsist. 1st, the innateness of the various fundamental dispositions, be they affective or intellectual; 2nd, the plurality of faculties distinct and independent of one another, “although effective actions usually demand their more or less complex co-operation.” These two principles are moreover the two correlative and interdependent aspects of the same conception, which is in accordance with what “common sense” has always thought of human nature. It corresponds to the division of the brain, from the anatomical point of view into a certain number of partial organs, at once independent and depending upon one another. To establish and to demonstrate the detail of this correspondence is the object of “phrenological physiology.” III. Comte took up the attempt where Gall had failed. But his doctrine passed through two successive forms. He himself calls attention to the importance and to the causes of this change. In 1837, when he was writing the third volume of the _Cours de philosophie positive_, he still closely followed not only Gall’s general conception, but also his anatomical and physiological hypotheses. He then thought that “the doctrine deduced by Gall from the method represents the true moral and intellectual nature of man and animals with admirable fidelity.” He approved of the division of the faculties into the affective and the intellectual, the organs of the former occupying the whole of the posterior and middle regions of the brain, and the organs of the others occupying only the anterior region of the brain, that is to say, a quarter or a sixth of the cephalic mass, “which at once re-establishes the pre-eminence of the affective faculties upon a scientific basis.” He even accepted the sub-division of these faculties into inclinations and feelings, and that of the intellectual faculties into perceptive faculties and reflective faculties.