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denuding waters, for if their action is intermittent— snbserial 

 at one time, subterranean at another— there is somewhat of a 

 break in that continuity which should be represented by 

 corresponding changes in the appearance and physical confor- 

 mation of the Combes and Valleys. Then as to the slips which 

 are local and exceptional, their tendency is to move only to the 

 extent necessary to obtain repose. This is exhibited in a 

 general way on the hill sides where they occur by an accumula- 

 tion of reconstituted ground in a condition of rest. The slips 

 from the Fuller's Earth obtaining in their descent suitable 

 under-drainage in the loose rocks of the Inferior Oolite, with a 

 sufficient slope to stand, becoming arrested. The important 

 subject of the carriage of Earthy Matter by the springs, is 

 referred to in a practical manner in Me. Witchell's paper, and 

 he shows that about 200 tons of such solid matter is annually 

 removed in apparently clear water from every square mile of 

 the Cotteswold country, a circumstance that may, and indeed 

 must have an influence on the general physical structure of the 

 district, although its specific operation in the Formation of 

 Valleys or Combes is not made evident. 



