The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 27
... field was not achieved until a German physicist , Carl Fried- rich Gauss , published " Allgemeine Theorie des Erd- magnetismus " in 1838 , in which his mathematical analy ... fields , including telluric currents Earth , Magnetic Field of 27.
... field was not achieved until a German physicist , Carl Fried- rich Gauss , published " Allgemeine Theorie des Erd- magnetismus " in 1838 , in which his mathematical analy ... fields , including telluric currents Earth , Magnetic Field of 27.
Page 33
... field , but many of them are unable to account for even the present geomag- netic field . A U.S. geophysicist , Walter M. Elsasser , in 1939 proposed that a thermoelectric electromotive force in the core might give rise to the electric ...
... field , but many of them are unable to account for even the present geomag- netic field . A U.S. geophysicist , Walter M. Elsasser , in 1939 proposed that a thermoelectric electromotive force in the core might give rise to the electric ...
Page 34
... field B. and the zonal flow v1 results in a toroi- dal magnetic field T1 , which is axially symmetric about the rotation axis . The dynamo process between T1 and v2 generates a toroidal field T2 whose longitudinal symme- tricity is ...
... field B. and the zonal flow v1 results in a toroi- dal magnetic field T1 , which is axially symmetric about the rotation axis . The dynamo process between T1 and v2 generates a toroidal field T2 whose longitudinal symme- tricity is ...
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activity Africa agriculture America became become body called capital caused central centre century changes Christian Church continued core countries cultural demand direction early Earth East Eastern eclipse economic effect established Europe example feet field Figure flow force groups growth important income increase industry internal investment Italy kilometres known labour Lake land later less living magnetic major mantle material means measurements ment metres miles mountains move movement nature North observed occur ocean organization origin Orthodox patriarch percent period planning Pleistocene political population position possible present problems production region relatively remained result rise River rocks social society South species structure surface theory tion trade traditional United West Western