Physical Geography of the Sea
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Description: This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1871. Not illustrated. Excerpt: ... very subtile mass is in a state of unstable equilibrium, and in perpetual commotion by reason of various and incessant disturbing causes--when we reflect farther upon the recent discoveries of Schwabe and of Sabine concerning the spots on the sun and the magnetic elements of the earth, which show that if the sun or its spots be not the great fountain of magnetism, there is at least reason to suspect a close alliance between solar and terrestrial magnetism; that certain well-known meteorological phenomena, as the aurora, come also within the category of magnetic phenomena; that the magnetic poles of the earth and the poles of maximum cold are at the same spot; that the thermal equator is not parallel to or coincident with either the terrestrial or with that which the direct solar ray would indicate, but that it follows, and in its double curvatures conforms to the magnetic equator; moreover, when we reflect upon Barlow's theory and Fox's observations, which go to show that the direction of metallic veins of the northern hemisphere, which generally lie northeast and south westwardly, must have been influenced by the direction of the magnetic meridians of the earth or air--when, I say, we reflect upon magnetism in all its aspects, we may well inquire whether such a mass of highly magnetic gas as that which surrounds our planet does not intervene, by reason of its magnetism, in influencing the circulation of the atmosphere and the course of the winds. 348. This magnetic sea, as the atmosphere may be called, is conThe needie in its di- tinually agitated; it is disturbed in its movements ZLISS by various influences which prevent it from adjustpKiTMH-hefetricCS ing itself to any .permanent magnetic or other dy1 DEGREESTMTM DEGREES foTtw? namical status; and its para-magne
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List price: $27.09
Copyright year: 0
Publisher: General Books LLC
Size: 7.44" wide x 9.69" long x 0.40" tall