History 320 African Americans 141 Social conditions 126 Education 110 Freed persons 101 Slavery 99 HISTORY 97 General 92 Antislavery movements 85 Politics and government 79 Art 70 Abolitionists 63 Gettysburg, Battle of, Gettysburg, Pa., 1863 59 Social life and customs 56 SOCIAL SCIENCE 55 Charities 54 Race relations 46 State & Local 46 Indians of North America 43 Finance 41 Freedmen 38 Private collections 38 Social aspects 38 Economic conditions 35 POLITICAL SCIENCE 34 Women abolitionists 34 Art, Modern 33 Civil rights 33 Art collections 30 Art, American 30 Middle Atlantic (DC, DE, MD, NJ, NY, PA) 30 BIOGRAPHY & AUTOBIOGRAPHY 27 Moral and ethical aspects 26 Enslaved persons 22 New England (CT, MA, ME, NH, RI, VT) 21 BUSINESS & ECONOMICS 20 Church history 19 Emancipation 19 Free African Americans 19 Painting 19 Quakers 19 Description and travel 18 Emigration and immigration 17 Irish Americans 17 Law and legislation 17 Legal status, laws, etc 17 Public Policy 17 Urban renewal 17 Working class 17 Economic history 16 Manners and customs 16 Buildings, structures, etc 15 Families 15 Immigrants 15 Italian Americans 15 City planning 14 Decorative arts 14 Ethnic relations 14 Folk art 14 Pennsylvania Dutch 14 Schools 14 Steel industry and trade 14 Women 14 Coal miners 13 Colonial Period (1600-1775) 13 Criticism and interpretation 13 Religion 13 Campaigns 12 Emergency clothing supply 12 Freemen 12 Historical 12 Military campaigns 12 Prints 12 Religious aspects 12 Anthropology 11 Artists 11 Broadsides 11 Catholics 11 Cultural assimilation 11 Electronic resources (E-books) 11 Ethnic identity 11 Frontier and pioneer life 11 Fugitive slaves 11 Iron and steel workers 11 Labor unions 11 Slave trade 11 Slavery and the church 11 Society of Friends 11 Soldiers 11 Christianity 10 Industries 10 Regimental histories 10 African American women 9 Cultural 9 Discrimination & Race Relations 9 Employment 9 Indentured servants 9 Intellectual life 9 Labor 9 Political activity 9