Page:ABC of Library Science.pdf/43

Rh 29

6, Subjects in Context:

Before placing a book in number, the topic for which that number stands is surveyed in relation to: |

(1) the superordinate topics under which it- falls. Looking back through the hier-. archy of broader subjects helps to: make clear the aspect of the immediate: subject which is intended.

(2) The co-ordinate topics which stand be-- side it. Looking at co-ordinate topics: helps to define and discriminate clearly’ between them and the number under: consideration,

(3) the subordinate topics which fall under it. Looking down through the sub- divisions of a topic helps to delimit its. scope and to find the most specific: number.

6, More than one subject:

(1) Ifa work deals with two subjects, class: it with the subject eiven greaver em- phasis, ep. class the effect of one subjecl on another with the. subject Teeled, :

(2) Ion work treats equally of two subjects,. classify the first and bring out the- olher in the entalogue with a subject.

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(3) If a work deals with three or more sub-. jects, choose a general number contain- ing all subjects if possible. If one: