Social Sciences 
300 Social sciences Sociology in general 
301-309 all hav Sociology in general as their subject, but it is treated in these various 
forms. - A periodical on Education is 370.5, not 305, which is only for periodicals on 
Sociology in general. In Sociology, most works in these forms ar limited to one division; 
e. g. to Political economy, Education, Law, etc. All these hav the same subdivision 
of General works; i. e. essays on the various divisions ar 310.4, 320.4, 330.4, and so on to 
essays on Manners and Customs in general, 300.4. A. naught in any clas number shows 
the subject to be general, not specific 
Sociology: philosofy, theories 
See also gor Philosofy of history; 320.1 Theory of state 
Compends, outlines 
Dictionaries, cyclopedias, etc. 
Essays, lectures, addresses 
Periodicals, magazines, reviews 
Societies: transactions, reports 
Education: teaching, study, etc. scossosmo 
Polygrafy: collected works, extracts, etc. 
Put here collected works of statesmen; e. g. works of Adams, Jefferson, etc. 
History of social science 
Social surveys } 
Divided like 040-999 and including general works on social conditions in special 
countries. May, if preferd, be clast in 014-919 or, if strongly historical, in 
040-009. Tor general histories of civilization see oor 
310 Statistics 
311 ~~ Theory, methods Science of statistics 
0X Purpose Use Value 
Methods, procedure, technic Preparation of statistics 
General questions 
Units of mesurement } 
Collecting 
Analysis Testing Verifying 
Arrangement Clasification Tabulation 
Correlation : 
Forms of presentation 
Diagrams and cartograms; grafs; frequency tables; index numbers 
Organization and direction of official statistics 
By country 
Subdivided like 030-000 
4 Organization and direction of unofficial statistics 
312 Demografy Population (progress of) 
Vital statistics: births, deths, mortality, longevity 
See also 614.1 Registration and vital statistics 
Statistics ar divided geograficlv like 030-999: e. g. Population of Maine 312.741 
22