202 THE WORLD OF LIFE 



extent of our oceanic areas. That all these agencies should 

 have continued to preserve such a uniformity of temperature 

 that almost the whole land surface is, and has been for count- 

 less ages, suitable for the continuous development of the world 

 of life, is hardly to be explained without some Guiding Power 

 over the cosmic forces which have brought about the result. 



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