881 
whole, for, up to a certain point, the more water there is retained by the 
plant the greater the vegetative activity. 
TABLE 1V.—Average saturation deficit for Lamao and Manila at 1 p. m. 
Feb. | Mar. | Apr. | May. | 
UNCC & Se SE aa i i oh Picts ae ea reel fern 
| nn A! SRE SOG TE 1598.1 | S04 ee | 81.3 
| | 
SS setae | $0.8] 286] 81.7 | 13.4 
ONE Sa 40.7 rh, F; 41.8 | 
le 
A comparison of the saturation deficit at the foot of the mountain with that 
of Station III shows an increase as one ascends. These data were taken at the 
time of the year and of the day when the transpiration is excessive. It is believed 
that the comparatively low saturation deficit together with the lower temperature, 
the effects of which will be discussed below, and the greater rainfall, help to 
maintain the more pronounced evergreen character of the vegetation on the 
slopes of the mountain in contrast with that at the base. A record of the maxima 
during some months of the dry season may not be out of place and it will throw 
some light on the differences at different altitudes. On February 26, at Station 
I, the saturation deficit was 53 at 2 p. m.; at the same time it was 32 at Stations 
If and III. The highest recorded in March was on the Ist day of that month, 
when it was 49 at Station IT and 42 at Station III]. In May on the 14th it was 
42 at Station II and 16 at Station III. 
Temperature.—The following tables give the comparative cor Apa aes 
of Manila and the various stations at Lamao (readings are in centigrade) : 
TaBLe V.—Mean monthly and annual temperature for Manila, 1883-1902. 
Me. le 3 Gel eae a me | | | | | ie 
| . 
| Jan. | Feb. | Mar. | Apr. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec. | Aver 
| | | 
sg wa et el Be BAe ae eee! Marcio os oe VMEONE, Sot ST, 
05 | 25.4 | 26.8 28.3/ 28.6! 27.9 | eee 7) m9) wa m2) a8 
eee Rea fot: | | | 
TaBLe VI.—Monthly and annual maxima of temperature in Manila, 1883-1902. 
a x . fy j af Cie | tas | 7 aor | 
% Jan, | Feb, | Mar. foe | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dec. og 
: 
| ike ae a a naam | | 
& 32.1 | | 32.9 34.8. 35.5} 36.1 85 83.5 | 33 | 33.3 33.3 | $2.2 $2.1 | 86.3 | 
TABLE VII.—Monthly and annual minima of temperature in Manila, 1883-1902. 
June. July. ANG) Sept. Oct. | Nov. | Dec. 
| 
| a | Feb. | Mar. | Apr. | May. 
| 
| 
| | 
| 
| 
| | 
1.9, 180 18.5, 20.8 2.7 22.6 22.4 | 
| 
22.8 | 2.4) 21.4 | 20.3 18.8 17.1 
“The highest recorded segipereture for Manila is 37°.8. 
“The lowest recorded temperature for Manila is 15°.7. 
41339——3 
ale Oi 
Pies ene ty 
