One truth added to another does not yield something more true. On the other hand, one good plus another good yields a better. But that this is so can only be understood by means of a special experience belonging peculiarly to this sphere, i.e. by means of the experience of acts of preferring which are qualified as right. As to the other branches of philosophy, the work of Brentano already published forms but a portion--often but the smaller portion--of investigations, which, in the manner above described, have become known to a larger or smaller circle of disciples. This explains the striking fact that, in proportion to the extent of what has been published, an unusually large number of investigators and scholars appear in a greater or lesser degree to have been influenced by Brentano. (Überweg-Heinze, in the eighth edition of the _Grundriss der Geschichte der Philosophie_, reckons, as belonging to his school, six names of men at present occupying important positions as teachers of philosophy.) One section of Brentano’s doctrine of sense-perception forms the substance of a lecture, _Zur Lehre von der Empfindung_, delivered at the Third International Psychological Congress held in Munich (1896), and published in the report of its proceedings (1897). A fragment of the above system of ethical inquiry, _Über das Schlechte als Gegenstand dichterischer Darstellung_ (Leipzig, 1892), treats of the worth and preferability of the ideas employed by the artist. With regard to psycho-genetic problems, apart from the question as to the meaning and validity of Fechner’s psycho-physical law, a question discussed in the first volume of his _Psychology_ and elsewhere, and that of the spirituality and immortality of the soul, which formed repeatedly the substance of lectures at Vienna University, Brentano has especially occupied himself with the laws of the association of ideas. One result of this study is his lecture, _Das Genie_, published in 1892, which seeks to explain the artistic productions of men of genius--often regarded as something quite unique and inexplicable--as a development of psychical events which universally control our imaginative life.