PART 2 of the new edition of the "Catalogue of Lewis's Medical and Scientific Lending Library", revised to the end of 1937, has now been issued (London: H. K. Lewis and Co., Ltd., 136 Gower Street, W.C.1. 16s. net; to subscribers, 8s.). It contains the classified index of the subject-matter of the books, with the names of their authors, upon medical and scientific subjects contained in Lewis's Library. An extensive subject is subdivided to facilitate reference; for example, chemistry has eleven, and agriculture thirteen, sub-headings. The date of publication is given, and a note is frequently added to indicate the scope of the work. It will be appreciated what a large number of works is listed when it is mentioned that the text occupies 156 pages, each with three columns and each column containing authors' names of some 30–45 works. The catalogue should therefore prove a very useful general guide to medical and scientific books.