513 History 127 Politics and government 111 Antiquities 102 Congresses 95 Missions 74 Agriculture 72 Description and travel 69 Biological Sciences 58 Economic conditions 58 Societies, etc 57 Education 52 Christianity 51 Social conditions 48 Zoology 47 Civilization 47 Horticulture 47 Religion 46 Buddhism 44 Geography 43 Social life and customs 42 Archaeology 42 Medicine 40 Geology 39 Hinduism 39 History and criticism 39 Mathematics 39 Numismatics 39 Science 38 Christian life 38 Economic aspects