XII, c, 6 Broxon: Moimt Baxxxihao’s Podoccvrpus Ixnhricatus 321 
means of a planimeter. An examination of Table II would indi- 
cate that the humidity at the top of Mount Banahao should be 
favorable for plant growth. 
Table II . — Relative humidity for periods of four weeks in forest at the 
top of Mount Banahao, Luzon, P. I. Altitude, about 2,100 meters. 
Four weeks ending— 
Maxi- 
mum. 
Mini- 
mum. 
Mean. 
Averagre daily — 
Maxi- 
mum. 
Mini- 
mum. 
Dec. 1,1916 
93,0 
81.6 
89.8 
91.1 
88.4 
Dec. 29.1915 
97.6 
85.0 
90.1 
91.7 
88.3 
Jan. 26.1916 
94.0 
71.0 
90.4 
91.7 
87.2 
Feb. 23.1916 
99.0 
72.0 
91.2 
93.6 
87.8 
Mar. 22,1916 
100.0 
51.0 
93.0 
96.9 
86.3 
Apr. 19,1916 
100.0 
62.0 
94.9 
97.9 
91.0 
May 17,1916 
97.0 
85.0 
92.3 
94.9 
89.6 
June 14, 1916 
97.0 
87.0 
93.1 
95.0 
91.0 
July 12,1916 
99.5 
86.0 
93.6 
96.0 
91.7 
Aug. 9,1916 
100.0 
71.0 
91.9 
94.7 
88.0 
Sept. 6,1916 - - 
99.0 
79.0 
92.5 
93.9 
89.0 
Oct. 4,1916... 
100.0 
88.5 
95.4 
96.8 
93.8 
Nov. 1,1916 
100.0 
91.6 
96.8 
98.2 
90.7 
92.7 
94.8 
89.4 
In Table III the temperature record is presented in the form 
of maxima, minima, mean, daily maxima, and average daily 
minimum for. periods of four weeks from October, 1915, to No- 
vember, 1916. The variations in the mean temperature for the 
different periods of four weeks are slight, the lowest mean for 
such a period being 13.2° and the highest, 15.8°. The average 
daily variation is also slight, the difference between the average 
maximum and the average minimum for the year being only 2,2°. 
There are, however, occasions when the temperature varies con- 
siderably from the mean. The highest temperature recorded 
during the year was 23.6° and the lowest, 5° ; so that the dif- 
ference between the maximum and minimum for the year is 
18.6°. This variation is small as compared with the variations 
in temperate regions. The temperature is constantly too low 
to be favorable for rapid growth at any time. 
