112 On the Heat of Springs, [Aue. 



as the winter 1810, 1811, was distinguished by the mildness of hi, 

 temperature; and in this respect far surpassed the winter 180°, 

 1810. Perhaps the lower temperature of the springs was owing to 

 the cold slimmer of 1810. 



But this difference is not sufficiently satisfactory* as it leads to 

 the expectation that it would have produced an eflect likewise upon 

 the constant springs. I found in 1811 the temperature of 



Langghjordes upper spring at Haga, almost as 7 40.000 



in the preceding year, April 24 5 



„ • .„ . C March 27 42*26 



Gnesta mill spring £ AprH 2g ' ^26 



Norhj spring, April 24 4271 



Norbyland spring, April 24 42*26 



Myrty spring, April 26 4370 



Priest spring at Haga, April 24 43*34 



Upsala mill spring, April 29 43*61 



„ c j -i • ^ March 20 4370 



Brennery, or Sandviks spring £ M 3 4 ^ Q 



From this table it appears that the constant springs do not alter 

 their temperature, or that the alteration is very insignificant. But 

 the heat of the inconstant springs was uncommonly great in the 

 spring, almost in the same proportion as the spring was distin- 

 guished by its unusual mildness. 



****** 



I have had an opportunity of making the following observations 

 on the temperature of springs in the southern provinces of Sweden. 



On the north side of the little hill called Blackstu, lying a little 

 to the south of Langstakrog, in Sudermannland, there is a strong 

 spring. On the 5th of September, 1810, its temperature was 

 44*42°, which agrees very well with the presumed temperature of 

 the earth in that part of Sweden. 



Norrhy Sauerhrunn, half a Swedish mile south from Swardhro, 

 in Sudermannland, rises with a strong current. Its temperature 

 was as follows: — 



1810— 6 September 44*06° 



181 1—26 May 43*07 



Not far from this, at Ladvgard, there rises another mineral 

 spring, the temperature of which was as follows : — 



1810— 6 September 44*24° 



1811—26 May 43*16 



Himmelslarlunds Sauerhrunn, at Norrkoping, a good and strong 

 spring : — 



1810— 7 September 44*24 c 



181 1—27 May 42*8 



10 



