290 UXDERGEOUND WATERS OF NORTH-WEST YORKSHIRE. 
Except in cases of exceptional flood the bed of the stream 
below this point is dry, and from the point where Pliilpin Lane 
crosses the channel, to Philpin Hole, it is occupied by meadow 
land, which shows no sign of having been recently overflowed. 
In the clough above Weathercote Cave the water can be 
heard below the stream bed, and actually comes to the surface 
in several places in wet weather. It emerges in the fine water- 
fall in Weathercote Cave, and again passes below the limestone 
at the bottom of that pot [PI. XXXVIII., Fig. 2]. 
The water, sinking in Weathercote Cave, then passes 
through the pool at the bottom of Hurtle Pot, and finds its way 
beneath the surface to God's Bridge [PI. XXXIX., Fig. 2], where 
it finally comes to light, and flows off the Mountain Limestone 
on to the Silurian rocks some 200 yards farther down stream. 
In extremely wet weather Weathercote Cave fills up and 
overflows at the surface, washing over the carriage drive, and 
flows into Jingle Pot (P 89), and also down the at other times 
deserted river bed. 
Hurtle Pot, when the stream is in moderate flood, makes 
an extremely weird noise, similar to that produced by the inrush 
of water and air when the plug is removed from the bottom 
of a lavatory basin, but immeasurably louder. This noise is 
caused by the suction of air through gigantic eddies produced 
in the deep pool at the bottom of the pot. 
In extremely heavy flood Hurtle Pot fills up and overflows 
into the surface channel, thus acting in a manner precisely similar 
to Footnaw's Hole, already described. 
The surface channel from Chapel-le-Dale church to God's 
Bridge is usually dry, but is occupied by the stream when in 
flood. 
The underground channel seems to follow the direction 
of the open one very closely, as the water can be heard at many 
points, and appears at the surface in wet weather. 
The following is the fluorescein record from which the 
above has been deduced : — 
Two pounds of fluorescein put into the stream just belo 
the mouth of Gate Kirk Cave, on the morning of August 23rd. 
