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Report of Committee of Investigation on Bog-flow in Kerry. 508 
the task which the contained water puts upon it, and it is only 
when weakened by unusually deep cuttings that it gives away. 
If this cause be considered sufficient, it might be thought un- 
necessary to discuss the question further, yet we think that the 
eruption of water from below, as Klinge suggests, though not as 
he postulates sudden and violent, may sometimes, perhaps fre- 
quently, have played a chief part; that, indeed, not a decrease in 
the support afforded by the crust, but an increase in the pressure 
of the contained fluid may have been the last in a train of causes 
which brought about the catastrophe. In the present instance the 
whole structure of the country (fig. 4) would lead the geologist to 
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Fie. 4. 
Geological Map, founded on that of the Geological Survey, showing the fault which 
underlies the sunken portion of the bog. Scale 1 inch to a mile. 
suspect the existence of springs: the southward dip of the beds 
forming the rising land to the northward of the bog, would convey 
subterranean water towards it from a large catchment basin; the 
fault underlying the bog would serve as a conduit, through which 
this water would rise beneath it. The water draining away from 
such a spring would give rise to the wet line in the bog. The 
existence of such a spring would also afford an explanation of the 
origin of the bog; about the waters escaping from it, bog plants 
