1 12 Mr, Six’s Experiments 
V 
the top of the well, may be fuppofed to reduce the water as 
far as It reaches to the mean temperature of the air above ; and 
thus I found it; for 51 degrees had been the mean temperature 
of the air near the fea-fhore for feveral days before. At the 
bottom of the well, near to which the chain never defcends, 1 
found the temperature 56 degrees; above 7 degrees warmer 
than that at Dover well. 
The water at the bottom of thefe wells is, I prefume, too 
deep beneath the furface of the earth ever to be affe£led by the 
temperature of the atmofphere ; for if the heat of the fummer 
could have had any influence on either of them, that at Dover 
muft have been mod confiderably affe&ed by it, efpecially in 
the month of September ; and the air was fomething warmer 
when the experiment was made at Dover than at Sheernefs. 
prom the nature of the different kinds of ffrata in which thefe 
wells are dug, had they been in all other circumffances the 
fame, one might reafonably exped to find the warmer fpring in 
the chalk, and the colder in the clay ; but here the reverfe is 
feen, without any apparent local caufe, except the different 
•levations of the fprings in refped to the level of the fea. 
Canterbury, 
Auguft l, 1787. 
I am, &c. 
JAMES SIX. 
TABLE 
