conveniently,”—a proposition which is thus proved: “we are more frequently accustomed to recline and look out at a window in company with another person than alone, and hence, since the builder of the house should satisfy the owner in every respect (§ 1), he must make a window wide enough for two persons conveniently to recline within it at the same time”.) Still this formalism is not without its advantage, for it subjects the philosophical content to a logical treatment. Thirdly, Wolff has taught philosophy to speak German, an art which it has not since forgotten. Next to Leibnitz, he is entitled to the merit of having made the German language for ever the organ of philosophy. The following remarks will suffice for the content and the scientific classification of Wolff’s philosophy. He defines philosophy to be the science of the possible as such. But that is possible which contains no contradiction. Wolff defends this definition against the charge of presuming too much. It is not affirmed, he says, with this definition that either he or any other philosopher knows every thing which is possible. The definition only claims for philosophy the whole province of human knowledge, and it is certainly proper that philosophy should be described according to the highest perfection which it can attain, even though it has not yet actually reached it.—In what parts now does this science of the possible consist? Resting on the perception that there are within the soul two faculties, one of knowing and one of willing, Wolff divides philosophy into two great parts, theoretical philosophy (an expression, however, which first appears among his followers), or metaphysics, and practical philosophy. Logic precedes both as a preliminary training for philosophical study. Metaphysics are still farther divided by Wolff into ontology, cosmology, psychology, and natural theology; practical philosophy he divides into ethics, whose object is man as man; economics, whose object is man as a member of the family; and politics, whose object is man as a citizen of the state.