The New Encyclopaedia Britannica, Volume 6Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 30
... observed characteristic of the geomagnetic secular variation is known as the westward drift of the geomagnetic regional anomalies . An increase or a decrease of the strength is more mark- edly observed , however , for some other ...
... observed characteristic of the geomagnetic secular variation is known as the westward drift of the geomagnetic regional anomalies . An increase or a decrease of the strength is more mark- edly observed , however , for some other ...
Page 31
... observed altitude range of 80-300 kilometres ( 50–186 miles ) and the direc- tion of wind is subjected to a fairly systematic daily vari- ation . When an air mass containing charged particles moves in the presence of a magnetic field ...
... observed altitude range of 80-300 kilometres ( 50–186 miles ) and the direc- tion of wind is subjected to a fairly systematic daily vari- ation . When an air mass containing charged particles moves in the presence of a magnetic field ...
Page 194
... observed from different positions . The transits of June 1761 and 1769 and those of December in 1874 and 1882 were , therefore , extensively observed . The next pair of transits of Venus will occur on June 8 , 2004 and June 6 , 2012. It ...
... observed from different positions . The transits of June 1761 and 1769 and those of December in 1874 and 1882 were , therefore , extensively observed . The next pair of transits of Venus will occur on June 8 , 2004 and June 6 , 2012. It ...
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19th century Africa agriculture America Azande Basin British Byzantine capital Catholic central centre changes Chinese Christian Constantinople continental continued core crinoids crust cubic centimetre cultural density depth Earth earthquakes East African Eastern echinoderms eclipse economic economists ecosystem Ecuador ecumenical equations Europe export feet forecasting fossil geoid geological geomagnetic geosyncline German gravity groups holothurians important income increase Indian industry investment isostasy Kenya kilometres labour Lake Lake Victoria land magnetic field major mantle ment metres miles modern Mombasa Monophysite Moon mountains movement nomic North northern ocean organization Orthodox Church output Paleozoic patriarch percent peridotite period planning political population Precambrian production region River rocks Russian sector seismic slope social society solar South Soviet species structure surface Tanzania temperature theory tion trade traditional tube feet Uganda underdeveloped countries United waves West Western