United States. Bureau of Education / Public libraries in the United States of America; their history, condition, and management. Special report, Department of the Interior, Bureau of Education. Part I
Dewey, Melvil, et al.
Chapter XXVIII. Catalogues and cataloguing, pp. 623-662
2Public Libraries in the United States. It is one of the marked advantages of the plan that these cross-ref- erences, notes, etc., may be added from time to time, as found conven. lent. It is necessary at first to find only the predominant tendener of the book, in order to catalogue it. It extreme care were taken to avoid mistakes, it might be well to keep books very difficult to class arranged by themselves for a time till read or carefully examined by some one competent to decide their true place. Cross-references are added when they are found necessary. After reading, a volume of sermons may be found to be aimed at the doctrine of evolution, though this fact was not noticed in classing. When it is found, however, the .evolution number, 575, is written under the religion-and-science.sermoi number, 255, and ever after a reader knows at once by this number the tendency of the volume. It is designed to add these numbers indi- eating more closely the character of the book as rapidly as possible, and specialists are invited to call the attention of the librarian to every de. sirable cross-reference they notice in their reading. These numbers take but little room, are easily added, and in most cases are valuable. Collected works, libraries, etc., are either kept together and assigned like individual books to the most specific head that will contain them, or assigned to the most prominent of the various subjects on which they treat, with cross-references from the others; or are separated, and the parts classed as independent works. Translations are classed with their originals. The alphabetical subject index is designed to guide, both in number. ing and in finding the books. In numbering, the most specific head that will contain the book having been determined, reference to that head in the index will give the class number to which it should be as- signed. In finding books on any given subject, reference to the index will gi-e the number under which they are to be sought on the shelv-es, in the shelf catalogue, or in the subject catalogue. The index gives after each subject the number of the class to which it is assigned. Most names of countries, towns, animals, plants, minerals, diseases, etc., have been omitted, the aim being to furnish an index of subjects on which books are written, and not a gazetteer or a dictionary of all the nouns in the language. Such subjects will be found as special chapters or sections of books on the sutbjects given in the index. The names of individuals will be found in the Class List of Biography. Omissions of any of the more general subjects will be supplied when noticed. In arranging the books on the shelves, the absolute location by shelf and book number is wholly abandoned, the relative location by class and book number being one of the most valuable features of the plan. The class number serves also as the location number, and the shelf num- ber in common use is entirely dispensed with. Accompanying the class number is the book number, which prevents confusion of different books on the same subject. Thus the first geometry catalogued is marked 513.1, the second 513.2, and so on to any extent, the last number show- 628
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