The New Encyclopaedia Britannica: Macropaedia: knowledge in depth. 19 v

19th century abrasive accelerator acid actinide actor Adams adhesives administrative adult advertising Aegean aerospace Aeschylus aesthetic Afghanistan agriculture aircraft airplane animals artist atomic Bantu Bantu languages basic behaviour Bronze Age carved Central centre changes Chari-Nile languages coast Congo contains countries Cretan Crete crops cultural Cyclades dance early East Egypt electrons energy engineering Ethiopia Europe European example farm feet figures flight Ghana important increase industry Kabul Khoisan Knossos known Lake land languages later mainland major masks materials ment metal modern Mycenae Nigeria Nilotic northern organization oxidation particles patterns percent period plants political population production proton Qandahar region River Sahara savanna sculpture soil solvent South Africa southern species style Sudan Tanzania temperature theory tion tons traditional United usually West Africa western Yoruba Zaire