LONDON. Aristotelian Society, December. 15.—L. J. Russell: Science and philosophy. Scientific, investigation makes use of hypotheses, but something more is needed in the search for truth. The inquirer goes to Nature with demands which his own nature enjoins on him. Demands like hypotheses are anticipations; they say more than Nature tells, but they go beyond hypotheses, for they challenge Nature. Some demands are logical, some esthetic, some metaphysical. Only legitimate demands can be satisfied, and we can only know what demands are legitimate by explicating the universe in detail by their help. There cannot be a view which is true in philosophy and in the end unworkable in science, or a view which is true in science and untrue in philosophy.