16 
Tab. XI. (Vapour tension e h .) 
ont hs 
Side? 
1 1 
Jan- Beb. Mar. Apr. 
Ill 
Mavjjun. 
' | 
Jul. 
Aug. 
Sep. 
Oct. 
Nov. 
Dec. 
Anu’I 
altitude of 
1000m. on 
tlie north. 
1 1 1 
2.7 2.9 3.7 6.0 
8.0 
10.3 
13.82 
15.20 
12.27 
7.56 
5.17 
3.24 
7.56 
altitude of 
1000m. on 
the south. 
3.1 3.2 4.0 6.1 
! I 
8.0 
10.0 
12.8 
14.1 
16.4 
7.5 
5.6 
3.7 
7.4 
It is not vapour tension that plays an important part in 
the formation of forest ; but it is saturation-deficit which is 
necessary and is the main cause in making forest. 
From Tables IX and XI, we get the following table show- 
ing saturation-deficit E — e h on both flanks. 
Tab. XII. (Saturation-deficit E-e /t .) 
Months 
Sides 
.Jan 
Feb. 
Mar. 
Apr. 
May 
Jun. 
Jul. Aug. 
Sep. 
Oct. 
Nov. 
Dec. 
Aon’l 
1000m. altitude 
on the north. 
1.01 
1.26 
1.61 
2.05 
2.99 
3.82 
3.39 
3.96 
2.4 
1.83 
1.8 
1.46 
1.16 
1000m. altitude 
on the south. 
1.6 
1.9 
1.58 
1.68 
2.36 
2.76 
3.32 
3.81 
2.9 
24 
2.39 
2.12 
1,56 
Here we see in this table that, in January, February, 
September, October, November and December, i.e. in the so- 
called non-growing season, the southern flank is much drier than 
the northern ; and contrariwise in the spring and summer, i.e. 
in the growing season. This difference of humidity clearly 
shows the difference of the vegetation of the two sides. 
