Pure Science 
500 
Science in general 
so1-509 all hav Science in general as their subject, but it is treated in these 
various forms. A periodical on Chemisiry goes with 540.5, not 50s, which is only 
for periodicals on Science in general. o in any clas number in any part of the 
classification shows the subject to be general, not specific 
Philosofy, theories, utilities, etc. 
Compends, outlines Ancient and medieval 
science 
Dictionaries, cyclopedias 
Essays, lectures, addresses 
Periodicals, scientific magazines 
Societies: transactions, etc. 
Education, methods of teaching and study 
Museums 
Polygrafy: collected works, extracts, etc. 
1 Extracts .2 .3 General scientific travels .4—.9 Travels an 
surveys (if general) divided geograficly like 940-999 
History of science 
501 
502 
503 
504 
505 
506 
507 
508 
500 
5I0 
Mathematics 
Works on Mathematics in gemeral, not limited to any one or two sections, a 
groupt by form of treatment like Science in general above; i.e. 
510.1 Philosofy .a2 Collections, compends .3 Dictionaries .4 Essays, papers 
tracts, letters .s5 Periodicals .6 Societies .7 Education .8 Logarithmic and 
other tables, instruments .qo Historv 
SIT 
Arithmetic 
See 372.7 Teaching elementary arithmetic 
Systems of arithmetic 
See also 512.81 Theory of numbers 
Notation and numeration Fundamental rules Abacus 
Prime numbers 
Fractions 
Analysis. Permutation and combination 
Proportion and progression 
Magic squares 
Involution and evolution 
Mercantil rules Interest Alligation 
Gaging 
Problems and tables 
| 
5 
61 
-p 
Mensuration