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Excerpt from A Teacher's Manual to Accompany High School GeographyThere are several current theories of the structure of the earth core. The one here stated seems to be established (1) by the resistance of the solid earth to the tidal attraction of the moon, which implies a rigidity greater than that of a sphere of steel, and (2) by the speed of earthquake waves which pass

Title : A Teacher's Manual to Accompany High School Geography (Classic Reprint)
Author : Charles Redway Dryer
Language : en
Rating :
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Type : PDF, ePub, Kindle
Uploaded : Apr 07, 2021

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