VOL. LII.5 PHILOSOPHICAL TRANSACTIONS. 6OI 



large cascade over part of it, during the rains. A small pagoda is lately built 

 over this rock. 



The other natural curiosity is a flaming well among the hills, about 4 miles 

 to the southward of the rock, that blazes on the surface of the water, which the 

 people of the country have inclosed with brick-work, in the form of a funnel of 

 chimney, that draws the flame to a point, and makes it burn fiercer. The 

 flame issues also with the water through some holes left in the brick inclosure, 

 for conveying it to an adjacent cistern, like fire confined, and wanting vent. 

 The water thus let out bubbles like a boiling pot, but close to the flame is only 

 lukewarm. A pagoda, built also over the well, is in a constant misty fume, 

 much like what rises from the waters at Bath in England, the taste of which, he 

 says, is like this, having drank of both. 



LXV. On the Extraordinary Agitation of the Waters in MounCs Bay, and 

 other Places, March 3\, 1761. By the Rev. fV. Borlase, M.A., F.R.S, 

 p. 418. 



March 31, 1761, about 5 in the afternoon, there was an uncommon motion 

 of the tide in Mount's-bay, Cornwall. It was full sea that day about half an 

 hour after 12. After the tide had ebbed about 4 hours and half, instead of con- 

 tinuing to retreat gradually, as usual, till it had completed the 6 hours ebb, on 

 a sudden it advanced as it is usually at the time of the moon, at an hour and half 

 before high water. It then retreated near to the point of low water, then it ad- 

 vanced again, and retreated, making 5 advances, and as many recesses, in the 

 space of one hour; viz. from about 5 to 6 o'clock; which was the whole time 

 that these uncommon stretches of the tide continued. But the first motion was 

 most considerable, the sea advancing the first time to a quarter ebb; whereas 

 the 2d advance was but as far as the sea reaches at half ebb. At the first surge 

 the waters rose at this place 6 feet perpendicular. At the pier of St. Michael's 

 mount, 3 miles to the east of Penzance, the tide was observed, at the same 

 time, to rise and fall about 4 feet. At Newlyn, a mile west of Penzance, the 

 tide rose to the same height nearly as at Penzance. At Moushole pier, 3 miles 

 s.w. of Penzance, it was only observed that the sea was in great agitation, and 

 the fishing-boats in danger. At the islands of Scilly, the sea was judged to rise 

 about 4 feet; but the agitation continued longer than in Mount's bay, viz. more 

 than 2 hours. 



On the coast of Scotland, from Fort Augustus on Lochness, we had accounts 

 that on the same 3 1st of March, about 2 in the afternoon, Lochness rose on a 

 sudden about 2 feet perpendicularly, and continued alternately rising and falling 

 for the space of ^ of an hour. The king's galley broke from her moorings, and 



VOL. XI. 4 H 



