We called attention last month to the completion of the plans for an international catalogue of scientific literature, and stated that Great Britain and Germany had each subscribed for forty-five of the three hundred sets that must be sold in order to defray the cost. It is obvious that the United States, with such a large number of libraries and educational institutions, should subscribe for its share of the sets, namely, not less than forty-five. The Smithsonian Institution has provisionally undertaken to represent the interests of the catalogue in the United States, and will receive promises of subscriptions. The catalogue will be issued in seventeen volumes, comprising the following subjects: Mathematics, mechanics, physics, chemistry, astronomy, meteorology (including terrestrial magnetism), mineralogy (including petrology and crystallography), geology, geography (mathematical and physical), palæontology, general biology, botany, zoölogy, human anatomy, physical anthropology, physiology (including experimental psychology, pharmacology and experimental pathology) and bacteriology. At least one volume will be given to each subject, and it is proposed that not all the volumes shall be issued at once, but in four groups, as soon as possible after the first of January, April, July and October, respectively. The subscription price for a complete set of the whole catalogue, in seventeen volumes, is £17, say $85. The volumes will vary in price and can be obtained separately, but it is necessary to secure the guarantee of the sale of forty-five sets in America during the month of September, and all libraries used for scientific research, and those individuals who can afford the cost, should send subscriptions to Dr. Richard Rathbun, Assistant Secretary of the Smithsonian Institution, Washington, D. C. * * * * *