UNDERGROUND WATERS OF NORTH-WEST YORKSHIRE. 285 
This stream rises on the N.W. slope of Simon Fell at a lieiglit 
of 1,750 feet at the base of the Yoredale Girt, sinks at 1,550 
feet, passes through a thin limestone, and re-emerges at 1,450 
feet at the base thereof. 
About 100 yards to the south another stream rises at 1.700 
feet, also passes through the thin limestone, re-emerges and 
flows parallel to Keld Bank Spring West, and finally joins that 
stream at 1,200 feet. 
The combined streams sink at P 82 at a height of 1.150 
feet. Fluorescein was put into P 82 at 12 noon on July 
4th, and was seen at S 105 at 5 p.m. on the same day. 
From S 105 the water flows overground for about thirty 
3'ards and again sinks at P 83. 
The master joints at P 83 run N. 25" W., and the secondary 
joints N. 10" E. 
Below P 83 is the enclosure known as Scar Close, the 
surface of which consists for the most part of bare limestone 
" chnts." 
Here the joints run S. 52" E., N. 28^ E., and N. 48' E., the 
former being most strongly developed. 
At the point marked P 84 on these clints running water 
can be seen at the bottom of one of the open joints at a depth 
of about 12 feet from the surface. This was seen to be coloured 
strongly by the fluorescein from P 83 on July 5th, the colour- 
being also observed on that day in the waters of Eller Keld 
Spring S 106. 
The presence of three sets of joints on Scar Close somewhat 
complicates matters, but it wall be seen that the flow is on the 
whole parallel to the master joints from P 83 to P 84 — while 
between P 82 and S 105 one of the secondary joints accounts for 
the direction of the underground stream, as is also the case 
between P 84 and Eller Keld Spring (S 106). 
Passing southward along the Fell side from P 82 a group 
of small streams is found to sink at P 93 (1,200 feet) on Fenwick 
Lot. The water from this sink was traced to a small spring 
S 106a below Eller Keld Spring. 
The next sink is that at the Washfold, P 96 (1,175 feet), on 
Souther Scales Fell, while a few yards to the south another 
