Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Том 84American Philosophical Society, 1941 |
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Сторінка 210
... magnetic survey of the United States is to know for any given period what is the magnetic distribution ; to find the secular change over a given period - usually 5 years ; to establish new stations ; to replace those which have been ...
... magnetic survey of the United States is to know for any given period what is the magnetic distribution ; to find the secular change over a given period - usually 5 years ; to establish new stations ; to replace those which have been ...
Сторінка 224
... magnetic compass but rather increased its importance as the two devices are subject to different kinds of interference with their effectiveness . The absolute vertical intensity data , while not having the same accuracy as the relative ...
... magnetic compass but rather increased its importance as the two devices are subject to different kinds of interference with their effectiveness . The absolute vertical intensity data , while not having the same accuracy as the relative ...
Сторінка 279
... magnet . The principal magnetic poles are distant 1200 miles or more from the geographic poles . The north magnetic pole , visited in 1831 by Ross and in 1903 by Amundsen , is in Boothia Peninsula in north Canada ( latitude 70 ° 30 ...
... magnet . The principal magnetic poles are distant 1200 miles or more from the geographic poles . The north magnetic pole , visited in 1831 by Ross and in 1903 by Amundsen , is in Boothia Peninsula in north Canada ( latitude 70 ° 30 ...
Зміст
Theoretical Synthesis of Supernova Spectra FRED | 1 |
July 30 1941 No | 5 |
Production of Secondary Electrons by Electrons of Energy | 33 |
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