r 



722 



EUECT FOLIAGE STEMS. 



Cedar of Lebanon {Ccclrus Libani), 2000 ; the Spruce Fir (Abies excelsa), 1200 ; 

 the Broad-leaved Lime {Tilia grandifoUa), 1000; the Arolla Pine (Finns Gembra), 

 500-700; the Larch (Larix Europcea), 600; the Scotch Pine (Pinus sylvestris), 

 570 ; the Abele (Fopulus alba), 500 ; the Beech (Fagus sylvatica), 300 ; the Ash 

 (Fraxinus excelsior), 200-300; the Hornbeam (Carjnnus Betulus), 150 years. 



The certified estimate^ of the heights of trees are of such general interest 

 that they are included below in the following table: — 



Eucalyptus amygdalina (represented in fig. 176, after a drawing by Selleny), 

 consequently attains the greatest height of all known trees. The highest of these 

 stems placed beside St. Paul's Cathedral would tower about 40 metres above the 

 cross, and would be only 4 metres lower than Cologne Cathedral. 



That the height and girth of trees do not increase proportionately will be 

 seen by comparing the following table with the previous one: — 



According to these certified estimates there actually exist plants whose stems 

 attain a diameter of 20 metres, and others whose stems rise to a height of 

 152 metres above the ground. 



^5X 



