114 On the Heat of Springs, [Aug. 



18)0—15 September 46-04° 



1811— \ June 44-42 



Somewhat less than JV'drnaby spring. 

 Another spring, at Brunlorp, was — 



1810—14 September 47'48° 



181 1— 1 June 44 ; 6 



The variation was smaller than that of Professor spring at 

 Upsala, but greater than that of Langhjerdcs spring. Hence it is 

 probable that the mean temperature towards the 20th of August 

 would be 46'94°, which agrees with that of Warnaby spring. 

 Notwithstanding the uncertainty of such an estimate, it serves at 

 least to show that this country has the advantage over Upsala in 

 point of temperature. 



The temperature of the Admiralty spring of Lyckcly, three 

 quarters of a Swedish mile north from Carlscrona, was as follows : 



1810—15 September 47'34° 



1811— 1 June 45-32 



If we assume the preceding data, these numbers give us 47'3* 

 for the mean temperature of the earth in this place. 



In Schonen I examined a spring at the church of Maglahem. 

 Its temperature was — 1811, 4th June, 44-6°. 



I likewise examined the Rqflunda spring, which Linnaeus men- 

 tions in his journey through Schonen. Its temperature was, on the 

 4th June, 1811, 44-96°. 



Neither of these observations is sufficient to enable us to deter- 

 mine the mean temperature of the earth in Schonen. 



V. 



At Berlin I have only found one spring convenient for such 

 observations ; but it appears extremely well adapted for them. It 

 is the perennial mineral spring in the Panckow, a quarter of a mile 

 north from Berlin. Its temperature was as follows : — 



1811—27 August .. 49-46° 1812— 9 January.. 49'46° 



7 September 49-46 13 February . 49-10 



29 49-4S 14 March . . . 49-10 



9 October.. 49*46 1 April 48-92 



7 December 49-46 



VI.— -Result. 



In all northern countries the mean temperature of the earth is 

 higher than that of the air ; and the difference appears to increase 

 as we advance northward, or as the cold of the winter becomes 

 more severe. The following table shows the rate at which the 

 temperature of the earth varies according to the latitude. 



