MOVEMENTS OF UNDERGROI'.XD WATERS OF NORTH-WEST YORKSHIRE. 103 



days, but as yet no result has been observed. This sink will be again 

 tested during the current year. 



AVhile waiting for the result of the above experiment the survey of the 

 underground passages in the neighbourhood of Alum Pot was continued. 



Previous experiments tried at the stream sinking at P 14 on Parrar's 

 Allotment having been without result, 2 lb. of fluorescein were put in 

 there at 7 p.m. on June 26. 



A look-out was kept at all the springs from Austwick Beck Head to 

 Turn Dub for a period of ten days, and also by residents in the neighbour- 

 hood up to the time of the next visit of the Committee, but without result. 



On the day following the introduction of the test there was a very 

 heavy flood, which may account for the non-success of the experiment. 

 This stream will be tried again as soon as favourable conditions occur. 



Streams near Ribblehead Station. 



S 102 is a small spring issuing from the grit beds of the Yoredale 

 Series, above Keld Bank, on Park Fell. The stream from this spring 

 sinks at P 73, about half a mile south-west of the station, at a height of 

 1,240 feet above the sea. 



A quarter of a pound of fluorescein was introduced at P 73 at noon on 

 June 29, and was seen at S 103 at 3.30 p.m. on the same day. It again 

 sank at P 74, and reappeared at S 104 at 3.35. 



About 30 yards below S 104 the stream has been partially diverted to 

 P 76, but a portion flows down the natural channel to P 75. 



By turning the whole stream alternately down P 75 and P 76 it was 

 possible to trace both lines of flow. 



First the stream \»^as turned down the normal channel to P 75, and the 

 fluorescein was seen at P 77 at 4.35 p.m., where it again sank, and was 

 seen half an hour later in P 78. 



Secondly, the flow having been diverted into the artificial channel to 

 P 76, the colour was seen in a trough at Brock Holes, the flow being 

 partly by a natural channel parallel to the main joints in the limestone, 

 and partly by a pipe to supply the trough. 



Fluorescein was next put into P 67, and was traced by S 95, P 68, S 69, 

 P 69, and S 97, to P 70, where it finally sank. 



The fluorescein from all the above streams emerged at S 99, below the 

 Station Hotel at Ribblehead, and subsequently at Batty Wife Hole, S 100. 

 It then flowed overground to P 72, where it again sank, to come to light at 

 S 101, near the bank of the Ribble below Gauber Farm, and so into the river. 



The spring at S 101 is .similar in appearance to Turn Dub, described 

 in the last report of the Committee, but is much smaller. 



In wet weather the excess of water from Batty Wife Hole flows over 

 the surface, by way of Batty Wife Beck, into the Pibble, which it then 

 joins some 100 yards further up-stream tliau the water which goes under- 

 ground. 



Streams near Colt Park Farm. 



The streams sinking at P 62, P 63, and P 64, near High Barn, were 

 found to unite in the spring at 8 89 and to flow overground to Colt Park 

 Farm, where the Water sank, to reappear at S 90, whence it flowed over- 

 ground for a few yards and again sank. This water was again seen in 

 the spring S 93, in Salt Lake Quarry, where it forms a waterfall visible 

 from the railway. It then cresses beneath the railway and sinks in » 



1 903, 



