830-54.
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
Encyclopedique des Sciences Medicales (4 series, commenced
in 1854, and still in progress); Jaccoud, Nouveau
Dictionnaire de Medecine 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
O