The New Encyclopaedia Britannica, Volume 4

activity American animals appear areas authority become body called cause cells century charge common complex conservation consists constant constitution contain continental continued copper cosmic rays countries court crime criminal Crusade direct early effect electron elements energy England established Europe evidence example exist fact field force ground groups House important increase individual industrial involved Italy known land later less letters limited living major material means measure ment metal methods natural occur organic original particles particular party percent period persons play political population position present problems protection reefs region remains represented result rule social South species structure theory tion types United usually various