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i 



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I 



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on of 



a 



'am 



ot 



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 liieh it 



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greai 



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Ch. XXXIIL] KECAPITULATION of chaps. XXXII. AND XXXIII. 243 



power of water in motion would tend to destroy. If tlie 

 diameter of the planet 



remains 



somewhat 



counterbalance the effect of volcanos and mineral 



^m 4H ^rt ^ ^ 



materials 



sprmgs, 



them' 



its leveL Subterranean movements^ therefore^ however de- 

 structive they may be during great earthquakes, are essential 

 to the well-being of the habitable surface, and even the very 

 existence of terrestrial species. 



andi 

 afpri 



m 



m 



onson 



.e tk 



bci. 



3lj the 



matter 

 hoHa 



t 



^ 



; cmst ' 

 •0 ate ' 



terres- 

 ^eniical 



as u"^? , 

 110 



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ott 





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re- 



e 



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