Periodicals 72 Almanacs, American 67 History 60 Railroads 52 Societies, etc 46 Fire departments 36 Finance 35 more ... Fires and fire prevention 33 Education 30 Directories 25 Charities 22 Women 22 Politics and government 17 Private schools 16 Description and travel 14 Societies and clubs 14 Coal mines and mining 13 Commerce 13 African Americans 12 Alumni and alumnae 12 Clubs 11 Hospitals 11 Law 11 Medicine 11 Schools 11 Students 11 Booksellers and bookselling 9 Canals 9 Baptists 8 Medical colleges 8 Pennsylvania imprints 8 Registers 8 School yearbooks 8 Universities and colleges 8 Agriculture 7 Curricula 7 Law reports, digests, etc 7 Museums 7 Music 7 Psychiatric hospitals 7 less ...