Law.—There is a useful list of legal bibliographies in the "Hand-list of Bibliographies in the Reading-room of the British Museum" (pp. 40-44). Clarke's Bibliotheca Legum, which was compiled by Hartwell Horne (1819), is a valuable work. Marvin's Legal Bibliography, which was published at Philadelphia in 1847, contains 800 pages. The Catalogue of the Law Library in the New York State Library (1856), forms a useful guide to the subject, and Herbert G. Sweet's "Complete Catalogue of Modern Law Books" is one of the latest catalogues of authority.
Mathematics.—A really good bibliography of Mathematics is still wanting. The following books, however, all from Germany, are useful.
Mathematics.—Murhard (F.W.A.). Bibliotheca Mathematica. Lipsiæ, 1797-1804. 4 vols.
—— Rogg (J.). Handbuch der Mathematischen Literatur. Tübingen, 1830.
—— Sohncke (L.A.). Bibliotheca Mathematica. 1830-54. Leipsic, 1854.
—— Erlecke (A.). Bibliotheca Mathematica. Halle-a.-S., 1873.
—— Professor De Morgan's Arithmetical Books (1847) is a model of what a good bibliography ought to be.
Medical.—Dr. Billings contributed a chapter on "Medical Libraries in the United States" to the U.S. Report on Public Libraries (pp. 171-182), in which he wrote—"The record of the researches, experiences, and speculations relating to Medical Science during the last four hundred years is contained in between two and three hundred thousand volumes and pamphlets; and while the immense majority of these have little or nothing of what we call 'practical value,' yet there is no one of them which would not be called for by some inquirer if he knew of its existence." The writer added a list of works of reference which should be in every Medical Library.
There have been a specially large number of Medical Bibliographies, from Haller's works downwards. James Atkinson's Medical Bibliography (1834, A and B only), is an amusing book, but of little or no utility. The most useful books are Dr. Billings's Index Catalogue of the Library of the Surgeon-General's Office (Washington, 1880) and the Catalogue of the Library of the Royal Medical and Chirurgical Society (3 vols. 1879), by B.R. Wheatley. Neale's Medical Digest (1877) forms a convenient guide to the medical periodicals. The two great French dictionaries—Raige-Delorme and A. Dechambre, Dictionnaire Encyclopédique des Sciences Médicales (4 series, commenced in 1854, and still in progress); Jaccoud, Nouveau Dictionnaire de Médecine et de Chirurgie Pratiques (1864, and still in progress)—contain very valuable references to the literature of the various subjects. Of special subjects may be mentioned H. Haeser's Bibliotheca Epidemiographica (1843), John S. Billings's Bibliography of Cholera in the Report of the Cholera Epidemic of 1873 in the United States (1875, pp. 707-1025), Beer's Bibliotheca Ophthalmica (1799), Dr. E.J. Waring's Bibliotheca Therapeutica (1878-79, 2 vols. 8vo.), and Bibliography of Embryology, in Balfour's Embryology, vol. ii.
Meteorology.—A full bibliography of books and papers upon Meteorology is being prepared at the United States Signal Office, and it is reported that 48,000 titles are now in the office. There have been several articles on this subject in Symons's Meteorological Magazine, the last being in the number for December, 1885.