VOPROSUI FILOSOFII I PSICHOLOGII. Vol. II. No. 4. May, 1891. CONTENTS: ETHICS OF LIFE AND OF THE FREE IDEAL. By _K. Ventzel_. (In this article the writer explains and criticises the well-known ethical theories of the late French thinker M. Guyau.) THE PESSIMIST THEORIES OF KNOWLEDGE: CRITICISM, POSITIVISM. By _E. de Roberti_. RELIGIOUS METAPHYSICS OF THE MOSLEM ORIENT. (Conclusion.) By _S. Umanetz_. LETTERS ON COUNT TOLSTOÏ’S BOOK. “On Life.” (Conclusion.) By _A. Kozloff_. (The writer concludes his letters to Mr. N. N. with remarks to the effect that count Tolstoï’s philosophy in all its aspects and phases is manifestly characterized by a principle of _dualism_. In the development of this general principle through the different phases of his system and in his theory of knowledge this dualism might assume the name of rationalism, in metaphysics, that of idealism, and in ethics the name of ascetical, quietistic eudemonism. ON DETERMINISM IN CONNECTION WITH MATHEMATICAL PSYCHOLOGY. By _N. Shishkin_. Lecture delivered before the Moscow Psychological Society. February, 1891. THE DOMAIN AND LIMITS OF SUGGESTION. By _N. Bajenoff_. Lecture delivered at the annual session of the Moscow Psychological Society. January, 1891. ANENT THE FICTIONS OF PROFESSED CHRISTIANITY. By _Vladimir Solovieff_. (This article has appeared in an English translation in _The Open Court_, Nos. 206 and 208, under the title “Christianity: Its Spirit and its Errors.” It is a remarkable contribution to the literature of to-day. Professor Nicolas von Grote of Moscow writes about its author: “Vladimir Solovieff is at present, besides the Count Tolstoï, our most eminent thinker; he is a distinguished philosopher as well as theologian.... You Americans should be familiar with his works on religious and ecclesiastical ‘questions’.” Vladimir Solovieff is the author of the following works: “The Religious Foundations of Life,” “The Dogmatic Development of the Church,” “Judaism and the Christian Question.” (These titles are translated from the Russian.) Other writings of his are “L’idée russe,” “La Russie et l’église universelle,” “Geschichte der Theokratie.”) SPECIAL DEPARTMENT. (1) Hegel’s Ontology. A Posthumous Dissertation. By _N. P. H. Platonoff_. (2) The Influence of fatigue upon the intuition of special relations. By _Nik. Marün_. (3) Fundamental moments in the evolution of the new philosophy. Main tendencies of the new philosophy. Empiricism and Naturalism. Bacon and Hobbes. By _N. Grote_. (Moscow.) γνλν. FOOTNOTES: [26] Specially translated for _The Monist_. [27] _Metamorphose der Thiere._ [28] _Vierteljahrsschr. f. wissensch. Phil._ 1890. 3, p. 249-292.