 | 1883 - 780 oldal
...remarkable, however, are the changes in the direction of the dip and variation needles, which take place at a distance from the place where the earthquake...carefully made, the. existence could not be denied of a connexion between terrestrial vulcanism and terrestrial magnetism." Mallet himself supplies the following... | |
 | James Samuelson, William Crookes - 1883 - 782 oldal
...remarkable, however, are the changes in the direction of the dip and variation needles, which take place at a distance from the place where the earthquake...not perceptible ; as, for instance, in Paris on the i9th February and 3ist May, 1822, simultaneously with an earthquake which occurred in Savoy and some... | |
 | Devonshire Association for the Advancement of Science, Literature and Art - 1884 - 858 oldal
...remarkable, however, are the changes in the direction of the dip and variation needles, which take place at a distance from the place where the earthquake...earthquake which occurred in Savoy and some of the north parts of France." Perhaps this shock was a more potent one, and extended further, than the one... | |
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In many instances in which opportunity of observing the magnetic needle during an earthquake has presented itself, an alteration in its direction for the time has been observed. . . . More remarkable, however, are the changes in the direction of the dip... 