AFFORESTATION OF CATCHMENT AREAS 93 
Hericut, GrowrH oF SAMPLE TREES IN OLDER Woops, LAKE VYRNwy. 
(sh. =sheltered ; exp. = exposed.) 
a ° 
; i 33 56 s&s gs 
Larch. | Silver Fir. | Spruce. ‘a8 £8 Ss 335 
5m BA RS | 38 
o = a 
Elevation 
in feet . | 865/900] 900} 900 | 865/900) 925 875 875 865 
Exposure 
to wind. | sh. |exp.| sh. | exp.| sh. | exp. sh. 
Years of Age.| Larch. Silver Fir. 
TimpeR VOLUME (QUARTER GIRTH) OF EACH SAMPLE TREE OVER 
Bark, Cusic FEET. 
a S 3 : 
83 2 Cs) =P 3:3 
Larch. Silver Fir. | Spruce. BE Es =§ hs 
Sa Pa RS ws 
o = p> 
ne en I I: | 42) | is 14 10 16 45 
These measurements show the great value of European 
larch and spruce for the production of timber in the 
mountains of Central Wales. Corsican pine does well at 
high elevations; and plantations of this species made in 
1906-1907 at 1300 feet above sea-level showed an 
average height of 10 feet in 1918, with leading shoots of 
the current season about 14 feet in length. The newer 
