CLIMJrE of RUSSIA. 231 



May 9. Heat of the air, lo'^- above o. 



Heat of the well in my garden, Imp. 

 Cadet Corps, 2°| above o. 



Now, as the mean heat of our climate Is 2°-/^, there is a very 

 remarkable coincidence between it and the heat of the water, 

 even taken under all the difadvantages mentioned above. How- 

 ever, I by no means offer this as the abfolute and exatfl tempe- 

 rature of deep wells and fprings in this province, which may 

 certainly be confiderably different. 



The mean heat of the only four countries determined in this 

 manner, that have fallen under my cognifance, make a fliort 

 but curious fcale, as they are of temperate, torrid, and frigid 

 climates. As for example : 



Mean heat of I Heat of wells 

 the climates. | and fprings. 



St Peteriburg, N. Lat. 59° 26' 23" Long. 30° 25' E. from the 2°Vir 2°y 



firft merid. of Greenw. 



London, N. Lat. 51° 31' Long, o 7°^ 7"^ 



Paris, N. Lat. 48° 50' Long. 2° 25' E. io« lo"!; in the 



cave under the 

 obfervatory. 



Klngfton, Jam. N. Lat. 18" 15' Long. ;6° 38' W. 2i°J 2i«^ 



The difference of temperature between London and Paris 

 is more remarkable than their diftance will account for, and, 

 of courfe, is an illuftration of the effed of infular fituation, 

 which was my reafon for fetting down two places fo near to 

 one another. Accident fometimes prefents us with one inter- 

 efting fadl when in fearch of another. This was my cafe, in 

 taking the heat of the earth in my garden, to contraft with that 

 of my well, for a particular purpofe. On April 19. 1789, 

 Reaumur's thermometer at 7° above o, I found the heat of 

 the earth, in a foft bed one foot from the furface, only half a 

 degree above the freezing point, and on the next day was afto- 



nifhed 



