APPENDIX TO MEMOIR OF PELTIER. 199 



We will cite further as extreme points the islands of Feroe and lakoutsk : 



KamcB of localities. 



Thorshaven 

 lakoatsk 



Longitude cast 

 of Paris. 



G2 2 

 62 1 



8 30 W. 

 127 24 E. 



Mean temperature of 

 winter in Centigrade 

 degrees. 



+ 4 3 



—38 9 



It has been our purpose, as far as possible, to introduce into these tables only- 

 places of little elevation above the level of the sea ; so that, in effect, there v/erc no 

 corrections to make in regard to the height. Yet there are exceptions, Moscow 

 being 148 metres above the level of the sea, Kazan 58, Wilna and lakoutsk 

 117. These heights, however, are much too insignificant to have any notable 

 influence on the results, for it is usual only to admit a diminution of 1° Centi- 

 grade for 200 metres of elevation. 



The preceding tables suffice to show the rapid decrease of the mean tempera- 

 ture of winter for the same latitudes in advancing from west to east. The dimi- 

 nution of the absolute quantity of rain in the year and the diminution of the 

 absolute and relative quantity of rain in winter are not less evident. If we count 

 the number of days of rain for the difi'erent countries of Europe, we have the 

 following: table : 



Number of days of rain in different regions of Europe. 



If, instead of taking the number of days of rain, we take the quantity of rain 

 expressed iu millimetres, we arrive at the same result : 



Quaniity of rain in the different regions of Europe. 



