=300 Sociology.=
301 Philosophy.
302 Compends.
303 Dictionaries.
304 Essays.
305 Periodicals.
306 Societies.
307
308
309 History.
=310 Statistics.=
311 Methods.
312 Progress of population.
313 Progress of civilization.
314 Europe.
315 Asia.
316 Africa.
317 North America.
318 South America.
319 Oceanica.
=320 Political Science.=
321 Patriarchal Institutions.
322 Feudal Institutions.
323 Monarchic Institutions.
324 Republican Institutions.
325 Colonies and Emigration.
326 Slavery.
327 Foreign and Domestic relations.
328 Legislative annals.
329 Political essays and speeches.
=330 Political Economy.=
331 Capital and labor.
332 Banks and money.
333 Stocks, rents, and income.
334 Credit and interest.
335 Communism.
336 Public funds and taxation.
337 Protection and free trade.
338 Production.
339 Pauperism.
=340 Law.=
341 International.
342 Constitutional and administrative.
343 Statute and common.
344 Equity.
345 Criminal.
346 Maritime.
347 Martial.
348 Civil and Canon.
349 Evidence and Forms of practice.
=350 Administration.=
351 Civil Service.
352 _Treasury._
353 _Interior._
354 _Police._
355 Army.
356 _Infantry._
357 _Cavalry._
358 _Artillery._
359 Navy.
=360 Associations and Institutions.=
361 Charitable.
362 Religious.
363 Political.
364 Reformatory and Sanitary.
365 Prisons.
366 Secret Societies.
367 Trades Unions.
368 Insurance.
369 Other.
=370 Education.=
371 Teachers, methods, and discipline.
372 Elementary.
373 Higher.
374 Self-education.
375 Classical and real.
376 Female.
377 Religious and secular.
378 Schools and Colleges.
379 Reports.
=380 Commerce, Communication.=
381 Domestic trade.
382 Foreign trade.
383 Post office.
384 Telegraph.
385 Railroad and express.
386 Canal transportation.
387 River and ocean transportation.
388 City transit.
389 Weights and measures.
=390 Customs and Costumes.
391 Ancient.
392 Medieval.
393 Modern.
394 _Europe._
395 _Asia._
396 _Africa._
397 _North America._
398 _South America._
399 _Oceanica._