The New Encyclopędia Britannica

activity America animals appear areas atoms became become body called camera century changes chemical Church colour common complete compounds consists containing continued drugs early effect electrons elements energy example existence experience Family field Figure fins fishes groups human important increase individual industry islands Italy known later lens less light liquid living lower major material means ment methods move movement natural North object occur organic original Peking Pentecostal percent period permafrost Persian personality pest Peter petroleum Philip philosophy photographs plant political position possible practice present printing problems production Quakers range result rocks similar social South species structure surface temperature theory tion United usually widely