ILLUSTRATION'S (18). CLIMATE OF AMERICA. 101 



Similar 

 Degrees 



of 

 Latitude. 



40° 43 



39° 57' 



38° 53' 



40° 51' 



38° 52' 



Eastern Coast 



of 



America. 



New York 



Philadelphia . 



"Washington . 



Western Coast 



of 



Europe. 



Mean Temperature 



of the Year, of 

 Winter, and Summer. 



Naples 



Lisbon 



52°.5 



52°.2 



54°.9 



61°.0 



61°.5 



32°.2 

 72°.9 

 32°.2 



T9° T 



I u .1 



36°.0 

 7l°.l 

 49°.5 

 74°.9 

 52°.2 

 71°.l 



Difference be- 

 tween the annual 

 Temperature of 



Eastern Ame- 

 rica and 

 WesternEurope. 



9°.3 



29° 48' 



30° 2' 



St. Augustin 



Cairo 



72°.3 



71°.8 



0°.5 



In the preceding table the number placed before the frac- 

 tion represents the mean annual temperature, the numerator 

 of the fraction, the mean winter temperature, and the deno- 

 minator the mean summer temperature. Besides the more 

 marked difference between the mean annual temperatures, 

 there is also a very striking contrast between the opposite 

 coasts in respect to the distribution of heat over the different 

 seasons of the year ; and it is indeed this distribution which 

 exerts the greatest influence on our bodily feelings and on the 

 process of vegetation. Dove* makes the general remark, that 



* Temper atur-tafehi nehst Bemerkungen uber die Verbreituvg der 

 War me cmf der Oberfldche der Erde, 1848, s. 95. 



