PT. III. OR POISONED BY VEGETABLE GROWTH? 147 



in raising tbeni into liyp^ethral existence ; and, as if to 

 show their nothingness in his hands, he redeposits them 

 in the subaqueous regions by the quiet action of the 

 rain-drop from heaven ; or, at his will, he places his all- 

 mighty finger on the mountain-top, and submerges it 

 bodily below the wave. And he has always, as species 

 died out, and probably continues, even at this moment, 

 to originate single stocks of new plants and animals, 

 which radiate from wdiere their Creator first locates 

 them as far round as his natural barriers will allow" 

 them. Every local change in physical geography 

 works not only a local but a general change in climate 

 and physical conditions over the whole globe. The 

 admirable Lyell accounts most magnificently for the 

 vast changes of the general temperature which have 

 evidently taken place over the whole globe, and shows 

 that these changes are and ever will be taking place. 

 That is, directly as land increases in polar regions and 

 decreases in equatorial regions, cold increases over the 

 whole surface of the globe ; and directly as land in- 

 creases in equatorial regions and decreases in polar 

 regions, heat increases over the whole surface of the 

 globe. 



Man, by his mental quahties — that is, by his arts, 

 not by his physical constitution — overleaps all ' natural 

 barriers.' His ' station ' is the globe, and there must 

 be wonderful changes in the ' physical conditions ' of its 

 entire surface ere man could be exterminated by them. 

 Man might smwive any number of continents, and his 



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