Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Том 84American Philosophical Society, 1941 |
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Сторінка 232
... evidence that the clays are not randomly magnetized . If the Earth's magnetism had slowly altered their original ... evidence from the varved clays , the Earth's field has remained relatively constant throughout time , changing only in ...
... evidence that the clays are not randomly magnetized . If the Earth's magnetism had slowly altered their original ... evidence from the varved clays , the Earth's field has remained relatively constant throughout time , changing only in ...
Сторінка 236
... evidence that large secular changes have continued in the same sense for longer periods . Although the compass - direction at London changed 35 ° -from 11 ° east to 24 ° west - between the years 1600 and 1800 , both before and after ...
... evidence that large secular changes have continued in the same sense for longer periods . Although the compass - direction at London changed 35 ° -from 11 ° east to 24 ° west - between the years 1600 and 1800 , both before and after ...
Сторінка 237
... evidence derived from the study of magnetization in varved clays which permits extension of the picture backward into past geologic ages . Fur- ther , and perhaps new and vital evidence will develop with the continuance of the ...
... evidence derived from the study of magnetization in varved clays which permits extension of the picture backward into past geologic ages . Fur- ther , and perhaps new and vital evidence will develop with the continuance of the ...
Зміст
Theoretical Synthesis of Supernova Spectra FRED | 1 |
Production of Secondary Electrons by Electrons of Energy | 33 |
Autonomous Versus Reflexogenous Activity of the Central | 53 |
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