The sixty-fourth meeting of the American Association for the Advancement of Science, and the eleventh of the "convocation week" meetings, will be held in Cleveland from December 30 to January 4. Between twenty-five and thirty national scientific societies meet during the same week in affiliation with the association. These include the American Society of Naturalists and the societies devoted to anatomy, anthropology, astronomy, biological chemistry, botany, entomology, horticulture, mathematics, physics, physiology, psychology and zoology. There will consequently be a large gathering of scientific men at Cleveland and the tradition of convocation week will be worthily maintained.
The geologists meet at New Haven and the bacteriologists in New York, and the chemists have decided to meet hereafter in the spring and autumn instead of in the summer and winter. This change has been made by the chemists owing to the fact that those engaged in industrial work find the end of the year an inconvenient period and