18 
winter, and is moister in the summer. This, we see in Tab. 
XII., is the condition of the southern flank of Mt. Fuji. 
In Tab. XII., we also see that, in the so-called non-grow- 
ing season, i.e. in the winter, the air on the north side is rather 
humid, but in the spring and summer the air is comparatively 
dry. The ever-green conifers are as susceptible to a code of 
humidity in winter as in summer. But in the growing season, 
they have comparatively a smaller leaf-area for evaporation than 
the deciduous broad-leaved trees. They are, therefore, less in 
danger than the deciduous trees if the air is dry during the 
growing season. In short, the conifers can stand comparatively 
dry air in the growing season, but they can not stand it in 
winter. Therefore, the conifers will do well in a region where the 
air is comparatively moist in winter, and dry in spring and 
summer. This, as we see in Tab. XII., is the case with the 
region of the northern flank of Mt. Fuji. 
As we have already stated, the temperature and rainfall 
can give but a faint explanation of the difference of the features 
of the forest-regions on the different sides. But a careful ex- 
amination of the effects of humidity will prove it a most im- 
portant reason for the differences found on the various flanks. 
4) Sunshine. Lastly we shall consider the difference of the 
duration of sunshine on the different sides. The following table 
shows the possible duration of sunshine on both sides, granting 
that the observations at the Kofu station may answer for those 
of the northern side of Mt. Fuji, and the observations at the 
Xumadzu station, those of the southern side of the mountain. 
Tab. XIII. 
^^-^Alonths 
Sides 
Jan. 
Feb. 
Mar. 
Apr. 
May 
Jun. 
Jul. Aug. Sep. 
I | 
Oct. 
Nov. 
Dec. 
Ann’l 
Kofu, northern 
side. 
311 
305 
370 
392 
435 
434 
442 1 416 | 370 
348 
308 
301 
4432 
Numadzu, south- 
ern side. 
312 
30G 
370 
391 
433 
432 
440 415 370 
346 
309 
304 
4431 
