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292 MERRILL AND MERRITT. 
to the east for a distance of between 4 and 5 kilometers, drops to a small 
stream at an altitude of about 1,170 m, and crosses this stream near the 
junction of two branches, one draining the west slope of Mount Pulog, the 
other draining the north or northwest slope. From this point the ascent 
is by a rapid rise, the slope up to an altitude of about 2,360 m being 
‘from 30° to 40°. The small Igorot settlement of Alam-am is found on 
this trail at an altitude of about 1,500 m, and above this the last settle- 
ment on the Benguet side, Ankiki, situated at an altitude of about 2,000 
m (2,190 m according to Mr. Benson), at the upper limits of the pine 
forest. The trial leads steadily upward from Ankiki, but from here on 
it passes through the dense mossy forest instead of through open pine 
forests and grass covered slopes that characterize the region below an 
altitude of 2,000 m. At an altitude of about 2,500 m the trail emerges 
from the mossy forest and passes into the summit grass lands, char- 
acterized by more gentle slopes, continues eastward and passes over the 
mountain immediately south of the highest peak. 
As noted above, Mr. Benson determined the altitude of the mountain 
to be 2,890 m. The Forestry Bureau party made a careful test for altitude 
by determining the boiling point of water. This was done several times, 
both at the extreme top and at the camp, which was situated at some 
distance below the summit. At camp the boiling point of water was 91° 
C., and at the summit was between 90.1° and 90.2° C. This gives an 
altitude of about 2,889 m (9,507 feet) at the summit, practically the 
same as that determined by Mr. Benson by other methods. All other 
altitudes cited in this paper are from aneroid barometer readings. 
The summit of Mount Pulog is doubtless subject to comparatively low 
temperatures. Mr. Benson records the fact that at the time of his visit, 
January, 1908, ice more than 1. cm in thickness formed at night at his 
camp, a short distance below the summit. None of the other parties 
encountered ice, but the temperature was disagreeably cold, especially in 
misty or rainy weather and at night. Records made by the Forestry 
Bureau party, on the ascent, are as follows: Altitude 1,500 m, at night, 
15.5° C; at 6 a. m., 16°; at 8.15 a. m., 18°: altitude 1,800 m, 9 awh, 
19°: altitude 2,250 m, 11.50 a. m., 15.5°: summit, altitude 2,890 m, 
11.50 a. m., 10°, weather misty, and with a strong wind blowing. 
Plate I shows the temperature registered at different times during 
the trip of the Forestry Bureau party. For convenience in observing 
the daily range of temperature, the records for each day have been con- 
nected with lines. From an examination of the chart (Plate I) it will 
be observed that the temperature on January 3, a wet, misty day, was 
practically the same at noon as at midnight. 
Mount Pulog, although situated in a region generally characterized by 
a heavy rainfall from June to November and by drier weather from 
January to April, is probably somewhat protected by the mountains to 
the west, and as a result possibly receives a lighter rainfall than does the 
ris eS ee es le 
