i *?6 Bijhop of Landaff’s Chfervatiom on 
with drought for many months, the heat of the ftrongeft well 
was 54° ; the water of the Granby pump was on the fame day 
48 ° s and the heat of the air in the (hade 76°. Dodlor Walker, 
who has lately written a treatife on Harrogate water, fays, that 
the heat of this fpring was 48°, when that of an adjoining 
rivulet was 53 0 . And I have little doubt in believing, that if 
the experiment was made in cold weather, the temperature of 
the fame well would be found to be feveral degrees below 48. 
This variation of temperature in the fulphur water indicates 
its fpringing from no great depth below the furface of the 
earth ; or at leaf!: it indicates its having run for a confiderable 
diftance in a channel fo near to the furface of the earth, as to 
participate of the changes of temperature, to which that is 
liable from the adtion of the fun. But the heat of the fulphur 
water is not only variable in the fame well, at different times, 
hut it is not the fame in all the wells at the fame time. If we 
call the ftrongeft well the firft, and reckon the reft in order, 
going to the right, the third well, which is reckoned the next 
ftrongeft, was 57 0 hot when the fir ft well was 54 0 . In flip- 
port of the conjedlure that the fulphur water of the ftrongeft 
well would in a cold feafon make the thermometer fink below 
48°, which is the conftant temperature of fprings fituated at a 
great depth in the earth in this country, it may be obferved, 
that though the firft and the third well are never frozen, yet 
the fecond and the fourth well are frozen in fevere weather. 
When the fecond and the fourth well are covered with ice, 
it is probable, that the firft and the third have a temperature 
far below 48° ; but that the fea fait, which is more abundant 
in them than in the other two wells, and which of all falts 
refills moft powerfully the congelation of the water in which 
