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HUTTONIAN THEORY. 



411 



among all thefe mountains, he obferved, that 

 the high or fteep fides look conllantly down 

 the rivers, while the Hoping or 

 have jult the oppofite direction. 



d fides 



Wh 



ng 



here 



orthward, he paffed the line of parti- 

 the waters from running fouth take 



their direction to the north, he found, that the 

 gradual flope, which had hitherto been turned 

 to the north, was now turned to the fouth : The 

 abrupt afpe6t of the mountains, in like manner, 

 from facing the fouth, was directed to the north ; 

 fo that, in both cafes, the hills turned their backs 

 on the line of greateft elevation *. 

 It is evident, therefore, that the form of this 



land has been determined by the flow working 

 of the ftreams. The caufcs which produced the 

 effeds here defcribed, began their action from 

 the line of greateft elevation, and extended it 

 from thence on both fides, in oppofite directions. 

 This is the moft precife character that can mark 

 the alluvial operations, and diftinguifh them from 

 the overwhelming power of a great debacle. 



366. Laftly, If there were any where a hill, or 

 any large mafs compofed of broken and fhapelefs 



/ 



ftones, thrown together like rubbifh, and neither 

 worked into gravel nor difpofed with any regu- 

 larity, we mull afcribe it to fome other caufe 



F 



than 



* Barrow's Travels into Southern Africa^ p. 245. 



