MONT BLANC, (ALPS.) 
Lat. 44° N.—Height, 15,600 feet. 
Elevation Mean temperature. Vegetation. 
in feet ; 
0] OfAugust - — - 690 . 
0 | Of the yeat - - 53° eke 
1,950 - - - The vine ceases. __ # 
2,925 - - - - Castanea vesea neater: renee , # 
3,900 - ~ - ~ cease. ; ’ 
4,680 - - - - Betula alba ceases. : 
5,850 - - - Pinus abies ceases. 
gee $01 Ofthe year = - - 32° | Rhododendrons cease. 
8,190 - - Salix herbacea ceases ase: 
: 8,780 - - - - Limits of perpetual snow: 
MONT PERDU, (PYRENEES.) 
. 2 Lat. 44° N.—Height, 11,375 feet. 
Elevation Mean temperature. Vegetation. 
in feet. 
3,250 | Of the year - - 420 
5,280 - - - - Oaks cease to grow. 
6,175 - - - - Pinus picea ceases. 
7,800 - ots Pinus rubra and uncinata cease. 
8,780' f Of Angus: " oe 95° eater eee 
~a : = 
SULITELMA, (LAPLAND.) 
a no Sige 
a Stine ie - 
Elevation Mean pa 4 Vegetation. 
in feet. 
es 
F Of the year - - 340 
: oft Of August - - 60° 
957 | Of the year é - 31°} Pinus sylvestris ceases. 
1,950 } Or August >t Bie |} Betula alba ceases. 
2,925 aon - - Salix herbacea and lanceolata cease. 
-_ is ce) 
3,640 s!0 huge year * * a i Limits of perpetual snow 
wy 
~ 23 : 
Th 
e effect of elevation is not, in Europe, the same with all hacer there 
are many that grow indifferently — the plains and upon mountains as 
igh as perpetual snow. De Candolle speaks of 700 instances, with which 
he is eee, of the Bicovalente of this law. But, ont the other hand, _ 
: : 
