There are articles on the freedom of will, on the infinite number of possibilities, mongolian cosmology, Pascal’s position toward scepticism, analogies between cognition of God and cognition of nature with special reference to Kant’s criticism of the evidences of the existence of God. The present number of vol. iv contains an article on the chemico-physical theory of atoms. The question is proposed whether or not this theory contains contradictions. The author starts from Dalton’s Definition, whom he regards together with Wallaston as the founder of modern atomism. The four weightiest objections are considered, but the author arrives at the conclusion that all of them are based upon misconceptions. He sums up: “Chemists and Physicists do not repudiate eyes and senses when proposing and defending the atomistic theory. On the contrary they use for their view and build it upon an exceedingly richer material of observation than is employed by their antagonists.... This denial of the validity of the most important objections, however, does not imply that the atomistic theory is without difficulties, gaps, unexplained details, etc. It is not as yet so certain a fact as for instance the heliocentric world-conception. It is an hypothesis still and will have to remain such for quite a long time. Yet we can confidently assert that the difficulties are by far less than those offered to the acceptance of the Copernican hypothesis at the time of the first condemnation of Galileo (1616) which were solved afterward by Galileo in the year 1632. We have further to state that the atomistic theory has been developed more and more since Dalton, the number and the importance of the explanations offered in it have constantly increased.” Dr. Frye of Jena discusses Preyer’s latest view of “The Self-Gubernation of Life—_Die Selbststeuerung des Lebens_” which appeared in a recent number of the _Naturwissenschaftliche Wochenschrift_ (Berlin). Preyer considers his newly discovered law as a corollary to the conservation of matter and energy and maintains that the total amount of life in the world is as much constant as are matter and energy. Living mass (_Mz_) plus inanimate mass (_Mn_) are constant (_C_); _Mz_ + _Mn_ = _C_. So far scientists will agree, but Preyer adds that each separate item is constant for itself. He declares that “the total amount of protoplasm in the world remains unchanged in quantity.” It is hardly probable that Preyer’s view will be adopted by science. Dr. Grupp discusses the logical paths of thought, and the editor, Professor Dr. Gutberlet explains and criticises Wundt’s System of Philosophy.