The student must bear in mind that it is far better to classify from the actual book, but where this entails any inconvenience the articles appearing in the “Nineteenth Century and After” and the books reviewed in the “Times Literary Supplement” may be classified. Further, I would urge the student to be ever on the _qui vive_ for books which seem to present most difficulty, as herein lies the best practice. FACTORS AND NOTES. Brief chronological list of the principal schemes of classification. _250_ B.C. Callimachus _1548_ Conrad Gesner _1623_ Francis Bacon _1678_ Jean Garnier _1679_ Ismael Bouillaud _1773_ Cels _1806_ Barbier _1810_ Schrettinger _1836-38_ British Museum _1842_ Brunet _1857_ Royal Institution (Vincent) _1859_ Edward Edwards _1870_ W. T. Harris _1873_ Cutter. Published _1876_ _1876_ Melvil Dewey _1879_ Schwarz _1887_ Sonnenschein _1888_ Hartwig _1890_ Bonazzi _1894_ Quinn-Brown _1898_ Brown’s Adjustable Brussels Expansion of Dewey _1902_ Library of Congress _1906_ Brown’s Subject CLASSIFICATION SYSTEMS USED IN BRITISH MUNICIPAL LIBRARIES. In looking over the statistics of nearly 600 British Municipal Libraries I find the systems of classification adopted stated as “Main Classes,” “Brown,” “Sectional,” “Adjustable,” “Fixed Location,” “Various,” etc., and to compile a list under the various heads would serve no useful purpose. I find, however, that the Dewey Decimal System, sometimes modified, is in use in over 300 libraries, Brown’s “Subject” and Brown’s “Adjustable” in over 100 libraries, Cutter’s “Expansive” in about 10, and the remainder various. COURSE 4: CATALOGUING. TEXT BOOKS REQUIRED. (_See also_ The Cataloguer’s Reference Shelf). A.L.A. & L.A.--Cataloguing Rules. Author and title entries, compiled by Committees of the American Library Association and of the Library Association. _Library Association, 1908. 5s._ Bishop (W. W.)--Practical handbook of modern library cataloguing. _2nd edition. Williams & Wilkins: Baltimore, 1924., Also Grafton, 8s. 6d._ British Museum--Rules for compiling catalogues in the Department of Printed Books. _British Museum, 1920. 2s. 6d._ Brown (J. D.)--Library classification and cataloguing. _Grafton, 1912. 10s. 6d._ Cutter (C. A.)--Rules for a dictionary catalogue. _Government Printing Office: Washington, 1904. Also Grafton, 3s._ Fellows (D.)--Cataloguing rules with explanation and introduction. _Grafton, 1922. 20s._ Hitchler (Theresa)--Cataloguing for small libraries. _A.L.A., 1915. Also Grafton, 12s._ Quinn (J. H.)--Library cataloguing. _Truslove & Hanson, 1913. 6s. Also Grafton._ THE CATALOGUER’S REFERENCE SHELF. (_Books other than those named in “Text Books,” and “Reading Lists” in this Course._) GENERAL. _Note._--The British Museum catalogue of printed books is one of the most useful works for finding any bibliographical data. A good atlas and gazetteer.