76 Dr Davy's Observations on Springs, Sfc. in Cornwall. 



Marazion. 

 The temperature of a pump-well about six fathoms deep, 

 a little after 7 P. M. was 54°. 



Huel Fortune. 

 September 16. — This mine has been stopped about three 

 years. There are now only three shafts open. The water in 

 each is about 16 fathoms from the surface. At 11 o'clock 

 this morning I found the temperature of each 



Temperature of water from old engine shaft, 55° b' 



From the Boy pipe shaft, - - 55 5 



From Brandon shaft, - - - 56 



The last shaft was more open than either of the others, and 

 its temperature consequently £° higher. The depth of this 

 never exceeded, I believe, 100 fathoms. 



Vanfell. 

 Within the last two months, a pump has been sunk at Van- 

 fell. It is five and a half fathoms deep, and contains pretty 

 much water. I tried its temperature at 1 P. M. to-day, and 

 found it 53° 5'. It is covered over. 



Alverton Well. 



Temperature of its water, which is now very scanty, 56°. 



November 17. — At noon to-day I found the temperature of 

 this well 54°. The flow of water is very little increased. 



November 18. — Found the temperature of the water in the 

 engine shaft of the Bay to-day 53° 5'. The height of the 

 water the same as before. Captain Banden says the shaft was 

 46 fathoms deep. 



Immediately after, I found the temperature of the old en- 

 gine shaft of the boiler, and of the Boy pipe shaft at Huel 

 Fortune, 54° b 1 each, the water being in both at 16 fathoms 

 from the surface. The depth of the first is 133, of the second 

 98, and of the third 78. The temperature of the air was 50°. 



