INTRODUCTION. 



Each class can be subdivided by simply carrying on the 

 decimal to as many places as may be desired. Thus : 



3 Sociology. 



34 Law. 



341 International Law. 



3413 Laws of War. 



'34 T 35 Neutrality. 



347 Modern Private Law. 



[See Table A : Subject subdivisions.] 



When the number of books in any class is great, it may 

 be convenient to arrange them in groups according to some 

 characteristics other than their common subject. Thus : 



Divisions by Form. Books on say International Law, as 

 shown above, would be all marked '341, but these may differ 

 much in the form of treatment of the subject systematic 

 treatises, dictionaries, essays, magazines, etc. If we insert a 

 cipher to show that our new groups are not limited to any of 

 the subdivisions of International Law, we may write : 



34102 Treatises on International Law. 

 34103 Dictionaries of International Law. 

 34104 Essays on International Law. 

 34105 Magazines of International Law. 

 34106 Transactions of International Law Societies. 

 [See Table B : Form divisions.] 



Divisions by Place. Books on say Private Law, as shown 

 above, would be all marked '347, but these may deal with law 

 in different localities. If we use brackets to indicate this 

 further departure from our original method, we may write : 



347 (4) Private Law in Europe. 

 347 (41) Private Law of Scotland. 

 '347 (4 2 ) Private Law of England. 

 '347 (43) Private Law of France. 

 '347 (73) Private Law of United States. 



[See Table C : Place divisions.] 



