We have given a summary of M. de Roberty’s general argument, instead of referring to particular propositions which may be open to criticism, because his work appears to us a very valuable contribution towards the elucidation of the important question as to the position of philosophy in relation to science. We shall look with much interest for the appearance of the author’s two further works which he announces as supplementary to the present one. That on Agnosticism is already in the press. The subject of the other work is Monism, which M. de Roberty characterises as “the chimerical pursuit which has essayed, through the ages, to fix the so-called unity of things, the extra or supralogical identity of phenomena.” This hypothetical monism of philosophy is dealt with incidentally in the present work. The “supralogical identity of phenomena” is a different kind of monism from that of _The Monist_. Ω. UEBER BEWEGUNGSEMPFINDUNGEN. Inaugural-Dissertation zur Erlangung der Doctorwürde vorgelegt der hohen philosophischen Facultät der Albert-Ludwigs-Universität zu Freiburg i. B. By _Edmund Burke Delabarre_ of Massachusetts. Freiburg in Baden: Hch. Epstein, 1891. Dr. Edmund Burke Delabarre introduces himself to the world of science with an excellent monograph on motion-sensations, based upon careful observations which were made in Professor Münsterberg’s psychological laboratory at Freiburg i. B. The subject of the dissertation is of great importance and there is much confusion prevalent at present even among the most prominent authorities. It appears to us that Dr. Delabarre has adopted the right view and he certainly defends it with great ability. Professor Wundt rejects in his Physiological Psychology all the theory of the so-called “muscle-sense” and admits that there is some truth in the three explanations devised as an explanation of our consciousness of performed motions, which thus would be a complex of (1) pressure-sensations, (2) specific muscle-sensations, and (3) innervation-sensations. This third kind of sensations is of a very hypothetical nature. The term signifies that, when muscles are innervated we are supposed to have a direct sensation of the innervation in the central nerve-organs; and this view is objected to by Münsterberg, who says that “a brain irritation which is not accompanied with centripetal effects or central after-effects of former muscular activity has its physiological consequences but excites no conscious states.” Thus, according to Dr. Delabarre, without the motion of the sense-organs, i. e. muscular activity, there is no consciousness; all consciousness derives its data from the periphery. Dr. Delabarre goes over the whole field of the literature of the subject and weighs all pros and cons. He finds that all cases are intelligible without the supposition of central innervation-sensations. He admits that the term muscle-sense is vague,