Excerpt from Decimal Classification and Relativ Index for Libraries, Clippings, Notes, Etc
When the first edition was published in 1876, 12 pages of tables containing the thousand sections were criticised as being altogether too elaborate for use even in a large library. As fast, however, as the Relativ Index with its remarkable powers became known, users askt for further subdivisions, and both tables and Index have steadily grown since it has been found so easy to gain the admitted great advantages of close classification, and yet avoid the old difficulties by means of the Relativ Index.
Extent of use. The register of libraries which have actually adopted the system, though growing rapidly, is known to be very incomplete. Names are often added of libraries which have used the system for five or 10 years without our learning the fact. A careful registry is kept of the buyer of each classification printed, but we make no assumption that a library has adopted the system because it has ordered a copy of the book.
We print below a brief table showing the growth of the four editions. The nearest estimate possible gives from 200 - 300 libraries, besides a large number of private book owners and literary workers having the system in daily use.
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