History 157 History and criticism 63 Learning and scholarship 56 Humanities 48 Archives 37 Paleontology 37 Antiquities 33 more ... Heredity 32 Education 26 Philosophy 25 Politics and government 25 Metabolism 24 Civilization 21 Museums 21 Intellectual life 20 Mayas 19 Research 19 Study and teaching (Higher) 19 Geology 18 Plants 18 Encyclopedias and dictionaries, French 17 Paleobotany 17 Plant ecology 15 Botany 14 Learned institutions and societies 14 Science 14 Science and the humanities 14 Social life and customs 13 American literature 12 Criticism and interpretation 12 less ...