Very different in character was the interesting and pleasing programme carried out by the Section of Botany in memory of two eminent workers in bryology who were long identified with Columbus--Dr. William S. Sullivant and his colaborer, Prof. Leo Lesquereaux, who was eminent also in fossil botany. Wednesday was set apart as "Sullivant day," and was marked by an extensive display of portraits, books, and specimens, and a series of memorial addresses, with notes on the progress of bryology. Twelve North American species of mosses have been named for Dr. Sullivant, and specimens of all these, with drawings made by him, were loaned for this occasion from his collection, now at the museum of Harvard University. Sets of duplicates of these species, from the herbarium of Columbia University, were prepared and presented as souvenirs to the botanists in attendance. Some members of Dr. Sullivant's family were present, and naturally felt a very deep sense of gratification at such a tribute to his name and fame. The address of the retiring president, Prof. F. W. Putnam, had a special interest in that it was the last official appearance of one who has been for so many years closely and prominently identified with the association as its permanent secretary, and whose presence and personality have seemed an essential element in every meeting. Professor Putnam, in opening, paid an especial tribute to the late Dr. D. G. Brinton, of Philadelphia, a former president and leading member of the association, devoted to the same branch of research with himself--North American ethnology--although holding different theories therein. Professor Putnam dealt with the prehistoric peoples of this continent, and argued for distinct racial types as expressed in the remains that they have left, and for resemblances as due to intercourse and mingling of tribes, and not to autochthonous development of arts and customs as the result of corresponding stages of evolution without contact or outside influence--the view maintained by Dr. Brinton. There is not space here to dwell further upon many valuable papers and discussions. The Section of Geology had a full and interesting session, in which glacial phenomena, especially as displayed in Ohio, bore a considerable part. One of the papers had a very wide and painful interest for all Americans--that of Mr. E. H. Barbour, on the Rapid Decline of Geyser Activity in the Yellowstone Basin. Careful and extended comparison of the present state of the geysers and hot springs with that to be seen a few years ago shows that these wonderful and impressive phenomena have greatly decreased in both the amount and the frequency of their manifestations, and Mr. Barbour warned all who desire to witness anything of their grandeur to visit the region without delay, as the indications point to their speedy cessation as probable if not inevitable.