Q0 Europe, general Q1 Turkey in Europe Q12 Turkey in Asia Q2 Palestine, Arabia Q3 Greece Q4 Balkan States Q5 Italy R0 France R6 Spain R8 Portugal S, T Europe (North, Teutonic, Slavonic) S0 Russia in Europe S15 Poland S2 Finland S25 Russia in Asia S3 Austria S34 Bohemia S4 Hungary S5 Switzerland S6 Germany T0 Netherlands T1 Holland T2 Belgium T5 Denmark T6 Norway T8 Sweden U, V British Islands U0 Ireland U2 Wales U3 England V0 Scotland V5 United Kingdom V6 British Empire W America W0 America, general W02 Canada W1 United States W5 Mexico W6 Central America W63 West Indies W7 South America W72 Brazil W76 Peru W78 Paraguay W8 Argentina W83 Chili W9 Polar Regions X Biography X0 Collective and Class X08 Heraldry X2 Portraits X3 Individual Biography =240. Adjustable Classification.=--The Subject Classification is the second scheme invented by Brown which has achieved success. The earlier scheme was the _Adjustable Classification for Libraries, with Index_, London, 1898, and is interesting as the forerunner of the much larger subject scheme. Only the main classes are given here: A Science B Useful Arts C Fine and Recreative Arts D Social Science E Philosophy and Religion F History and Geography G Biography H Language and Literature J Poetry and Drama K Prose Fiction L Miscellaneous This initial alphabetic notation is divided by a progressive numerical notation, of which the following is a sample: D Social Science 2-8 General 10-92 Manners, Customs, etc. 94-150 Political Economy 152-272 Government and Politics 274-354 Law 356-358 Commerce, Finance 400-424 Communications 426-484 Education CHAPTER XVII PRACTICAL APPLICATION =241. Numbers.=--The class letters and numbers of all books should be written in the inside, preferably on the back or front of the title-page, and should also be carried on to the labels, book-cards and all other records. On the outside the class letters and numbers may be lettered in gilt or written on a suitable tag, which must be firmly pasted on the back. The usual position for the tag is at about 1½ inches from the foot of the back, as this gives regular and uniform marking, which looks neat. Some librarians prefer a place at the top of the back, as the arranging number thus becomes more prominent, and the tag at the foot is more subject to handling. The diagram shows the two methods. [Illustration: FIG. 73.--Lettering of Class Numbers (Section 241).]