By this method the real subject of the book was often missed, more especially if the author had made use of a fanciful title, and one subject would be found under many different entries, according to the word used on the title-page, and without cross references to bind them together. It must be confessed that to-day many of the dictionary catalogues of public libraries are no more than this “index catalogue” under the newer name. The entries may be a little fuller, but the principles of compilation remain the same.

7.—Prior to 1876 there was no complete code of rules for the preparation of a subject as well as author catalogue, though Prof. C. C. Jewett’s “On the construction of Catalogues of Libraries” (Washington, 1853), with its subsequent modifications, was a step in this direction. There were rules for author catalogues, for the most part based upon the British Museum rules, as well as schemes of classification for classified catalogues. In that year was published the now well-known “Rules for a Dictionary Catalogue,” by Charles A. Cutter, Librarian of the Boston Athenæum. It appeared as the second part of the “Special Report on the Public Libraries in the United States of America,” issued under the auspices of the United States Bureau of Education. A second edition of these rules was separately issued in 1889. The third edition, with further corrections and additions, appeared in 1891, and has been most liberally distributed by the United States Government to the libraries of the world. Since 1876 other rules have been formulated, principally with Cutter’s as a basis. A consensus of these will be found in the “Eclectic Card Catalog Rules, Author and Title Entries,” by K. A. Linderfelt, Librarian of the Milwaukee Public Library, Boston (Charles A. Cutter) 1890. This most useful compilation, “based on Dziatzko’s ‘Instruction’ compared with the rules of the British Museum, Cutter, Dewey, Perkins, and other authorities,” is not as well known to English librarians as it should be. The present Manual is intended to serve as an introduction to these two codes, and the instructions contained in it are based upon them. When these have not been adhered to the changes made have obtained authority in library practice. Mr. Henry B. Wheatley’s interesting little book, “How to Catalogue a Library” (Stock, 1889), must also be mentioned, and should be read as an introduction to the subject.

8.—The great merit of the dictionary catalogue is that it can be made to supply most of the information usually asked for by those using libraries, and by immediate reference without any preliminary study of its arrangement. It obtains its name from the circumstance that all the entries, irrespective of their nature, are put into a single alphabetical sequence, and consulted as one would consult a dictionary. It is considered to be the most acceptable form to the majority of those making use of popular libraries, and experience has proved it to be so.

The dictionary catalogue is intended to answer all of the following questions:

What books are contained in the library by a given author, as, Hall Caine? The answer to this is called the author-entry.

What books have you upon a specific subject, as the dynamo; or upon a particular topic, as the Eastern question? The entries answering such enquiries are the subject-entries.

Have you a book called, “A Daughter of Eve?” The entry supplying this information would be the title-entry.

Have you any volume of a series, as, “English men of letters?” This it will also answer, and the reply may be termed the series-entry.

There are questions, however, that the dictionary catalogue does not ordinarily answer. It would not tell what books were in the library in a particular language, say French, and it will not provide a complete and definite list of books in a particular form, as fiction, or poetry; or in a class of literature as distinct from subject. For example, it will not group together all the theological works, or the scientific books, but will distribute them throughout the entire alphabet, according to the divisions of these subjects, and these divisions will in their turn be distributed according to lesser divisions and monographs.

A catalogue compiled upon the lines requisite to group such classes completely, so that a general treatise and a monograph upon a minute division will follow in natural order, would be a classified catalogue, and that form is dealt with separately in Chapter XII.