Bulletin of the American Mathematical Society, October.—The number opens with an account of the fifth summer meeting of the Society, which was held at the Massachusetts Institute of Technology, Boston. As on former occasions, the Society was affiliated with Section A of the American Association for the Advancement of Science. There was a large attendance of members, and at the three sessions which were held twenty-five papers were communicated. Short abstracts of papers by Messrs. Blake, Chessin, Lovett, Baker, Hall, Moore, Conant, Boyd, Stecker, Dickson, Stabler and Martin are given. The journals in which these papers will appear are indicated. Note on the generalisation of Poincaré and Goursat's proof of a theorem of Weierstrass's, by PVof. Osgood, gives an interestiag sketch of the theorem, accompanied by full references to original memoirs.—The same author supplies a supplementary note on a single-valued function with a natural boundary, whose inverse is also singlé-valued. This is supplementary to a paper in the June Bulletin, and states the writer's indebtedness for a simple proof of his principal theorem to Prof. Hurwitz.—Prof. Chessin contributes a note on the periodic developments of the equation of the centre and of the logarithms of the radius vector.—The theorems of oscillation of Sturm and Klein is a third paper on the subject, by Prof. Bôcher. Its object is to extend the results previously established to some cases in which the coefficients of the differential equation (discussed in the preceding papers) are no longer continuous throughout the intervals considered in the investigation. The article occupies pp. 22–43. There are numerous vacation notes, and a long list of new publications. It is worth noticing that the Society has appointed a Committee to consider the question of securing improved facilities for the publication of original mathematical papers (in the States). On p. 48 it should be Prof. Price has resigned the Sadleian Professorship (not Sadlerian, which is a Cambridge professorship).