A DECIMAL CLASSIFICATION FOR FORESTRY LITERATURE 453 



profession by taking the necessary action 'leading to the adoption of 

 a standardized and uniform system of classification for forestry? 



CLASSIFICATION OF FORESTRY 



.0 General forestry. (Material covering entire subject or several branches 



not classified elsewhere.) 



.01 Bibliographies. 



.02 Manuals of forestry, general treatises, essays, addresses, documents, 



etc. 



.03 Dictionaries, encyclopedias, yearbooks, almanacs, calendars, etc. 



,04 Biographies 



.05 Forestry periodicals, lumber and trade journals. 



.06 Proceedings and reports of societies, associations, commissions, con- 



ventions, federal, state, and municipal forest officers, etc. 



.07 Forest education. (See also .9713 and .9724.) 



.071 Forest schools. 



.072 Arbor day. 



.073 Nature study and general propaganda. 



.08 Forest experiment stations. 



.09 History and status of forestry. 



.091 United States (alphabetically by states). (See also .941, .971, .972, 



.973, and .974.) 



.092 Foreign countries (alphabetically by countries). (See also .942 and 



.975.) 



.1 Forest botany. Forest biology. 



.11 Anatomy and morphology (including cytology and histology). 



.12 Physiology (including phenology). 



.13 Taxonomy. 



. 14 SUvics. Forest ecology. Biological dendrology. (For acclimatization 



and tree introduction see .257.) 



.141 Ecological factors. 



.1411 Climatic. Atmospheric. 



.1412 Solar. Ethereal. 



.1413 Edaphic. Soils. 



.1414 Biotic. Animals. 



.142 Reproductive power. 



.1421 Seed production (including age of bearing, amount, periodicity, 



time of ripening, fall fertility, and losses). 



.1422 Ability to reproduce by sprouts. 



.1423 Ability to reproduce by cuttings. 



. 143 Tolerance. 



.144 Growth. 



. 145 Resistance to adverse conditions and recuperative ability, 



,146 Forest types and site qualities. Forest geography. 



.1461 Determining criteria. 



.1462 Origin. 



.1463 Development. 



