The New Encyclopædia Britannica, Volume 16Encyclopaedia Britannica, 1981 - Encyclopedias and dictionaries |
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Page 33
... Conservation laws in physics state that certain measur- able quantities , called physical properties , do not change in the course of time within an isolated physical system . Common examples are the conservation laws of electrical ...
... Conservation laws in physics state that certain measur- able quantities , called physical properties , do not change in the course of time within an isolated physical system . Common examples are the conservation laws of electrical ...
Page 39
... Conservation of Natural Resources Although the history of conservation is as old as man- kind , the use of the word in the contemporary context is relatively recent . Over the years conservation has ac- quired many connotations : to ...
... Conservation of Natural Resources Although the history of conservation is as old as man- kind , the use of the word in the contemporary context is relatively recent . Over the years conservation has ac- quired many connotations : to ...
Page 62
... conservation , which have yet to be completely understood or accepted on Earth , will be applied to other worlds before irrevocable damage is done . At the present time , however , the available knowledge brought back from outer space ...
... conservation , which have yet to be completely understood or accepted on Earth , will be applied to other worlds before irrevocable damage is done . At the present time , however , the available knowledge brought back from outer space ...
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19th century Africa American animals areas became bee-eaters cells centimetres central centre century Church collagen conifers connective tissue conodonts conservation conservatism constitution continental continental drift copper Coraciiformes coral cosmic rays countries court covenant Cretaceous Crete cricket crime criminal Cro-Magnon crocodiles Crusade cultural deposits disease early Earth economic effect energy England Europe federal forest fossil France French function genera geosynclines groups hoopoes hornbills illus important industrial Iráklion island King known land later Le Corbusier legislation major ment metres minerals modern natural North Nyssaceae occur ocean Ordovician organized original Parliament particles party percent period plants political pollution population problems protection reefs region result River rock Roman Saladin sediments social South Soviet species structure theory tion town trade traditional trees tropical trouvères Union United usually western