INTRODUCTION. 



As the large majority of books in divisions '343, '346 and 

 347 deal with Scots Law, it has been thought best to omit for 

 these the distinguishing (41). Thus : 



347 Private Law of Scotland. 



Divisions by Relation. A book may deal with two or 

 more subjects, or with a subject in its relation to some other 

 topic. After assigning to the book the number denoting its 

 first or principal subject, we may link on to this number, by 

 means of a colon, the number denoting the second or sub- 

 sidiary subject. Thus : 



34012 : 341 Law of Nature and Nations. 

 34 : 37 Law relating to Education. 



So long as only the ordinary digits are used in the class 

 numbers, the arrangement of books on the shelves presents 

 no difficulty. They follow each other in the ascending order 

 of the decimal fractions employed. Thus : 



'34 



3405 

 342 



34526 

 '349 



But when brackets and colons are used as well as digits, 

 it is convenient to adopt the convention that these come in 

 the alphabetical order of their names (bracket, rolon, </igit), 

 the cipher taking precedence of all three, on the familiar 

 indexing principle, " Nothing precedes something." Thus : 



3405 

 '34 (41) 

 '34 (73) 

 '34 : 35 2 

 '34 : 37 

 342 



