_2._ How would you mark book-stacks, shelves, etc., in a large open-access library in order to guide readers to specific subjects? _3._ Compare the notations of the Decimal and Subject Schemes. _4._ After the classification number has been applied it is still necessary to individualise the books within the limits of a subject. Describe what you consider to be the best method, with alternatives. _5._ Illustrate by examples from the Decimal Scheme the advantages derived from its mnemonic features. _6._ Give the chief marks, with explanations, used in the Brussels extension of the Decimal classification. _Lesson 5._ PRACTICAL. As a preliminary to actual classification it is essential to obtain a thorough grasp of certain rules which, in a general sense, govern the placing of books. With this aim in view students should first read Chapter _12_ of Sayers’s “Introduction,” and again read Jast’s “Library classification” in Greenwood’s Library Year Book, _1900-1901_, and the Introductions to the Decimal and Subject Schemes. Students may afterwards pass on to Sayers’s “Introduction,” part _3_--A short course in practical classification, with special reference to the Decimal and Subject schemes. This provides a thorough test of ability in classification, bringing forward examples requiring a decision on the points which present most difficulty in practice. It is important that students should guard against misuse of the index. In placing a book reference must be made direct to the schedules, and the index used only as an aid to, not a means of classification. TEST EXAMINATION. _Questions to be answered without the aid of text-books, notes, etc._ _1._ It is impossible to think or to reason aright unless we classify. Explain. _2._ In what way may the physical form of a book affect the classifying of it? _3._ The Decimal Classification contains instances of “cross-division.” Name as many as you can. _4._ What are the respective advantages of a relative and a specific index? _5._ Explain the geographical divisions in the Decimal, Subject, and Expansive Schemes. _6._ In a classified library the shelf arrangement is affected by the size of the books. What arrangement would you adopt, and in what way would this affect the guiding? _7._ What does Brown mean by “locality” _versus_ “subject”? Give examples. _8._ Explain the difference between history as a “topic” and as a “form.” _9._ Detail the respective advantages and disadvantages of a “pure” and a “mixed” notation. _10._ State briefly the arguments for and against separating a complete set of an author’s works. A practical test is not included, as this, in its best form, is easily accessible in the papers set at past Library Association examinations, which are obtainable from the office of the Association.