Ree ee ee 
eee 
ama a es 28h il eines Wide ding | 
382 
Taste VIII.—Average monthly tenperature of three readings (7 a. m., 1p. m., and 
6 p.m.) in Manila and Lamao for a portion of 1905. 
RADE ms Be Cae 
; Feb. Mar, | Apr. | May. | June. | July. | Aug. | Sept. | 
RA ae ees ASR MET ATTY SEM IRS: EIN | : | 
URL bene aot So ease 1b. T. |). 28.6] ORB | 29,7 29.6 26.6 96/6 fuses ocak 
| A BE er 25.8 | 25.2 | igs [28.5 ann enne| anne nnen anne ence ennnnnne | 
BORED Oo EWE ft RENAN eden RORY ee 21.0 22.6 24.5) 23.4 | 22.7 21.9 23.1 22.8 
Le MARIN dst es SE | 
| 
ee 
A 28.0 | 29.5 29.6 | 28. 22.7 | 27.6 | 27.0 | 
| i ! } | 
TasLe IX.—Absolute monthly maxima of temperature (1 p. im.) in Manila and Lamao 
for a portion of 1905. 
: aeea Be 
Feb.!7 | Mar. | Apr. | May. | June, | July. | Aug. | Sept. — 
RmOn esta UG loa aee 32.4 35.8 36.0 | 36.5 34.0 
| 34.0 MP econ 
Bia itity Fieai sce ck ees 30.5 84.0 lone oa > gee lina i deed Freee 
| Station ITT bien 24.6 27.0 28.6 | 28.0 | 26.0 26.2 26.2 | 26.0 
Mier Maier scsdlisesoatdacih 32.5 ae, 31.7 | 35.5| ‘84.4 | 31.9 | 83.0 | 33.9 | 
TABLE X.—Monthly minima of temperature (7 a. m., 6 a.m, or 6 p.m.) in Manila 
and Lamao for a portion of 1905. 
Ripeace | 
| Fe. | Mar. Apr. | May. | June, | July, | Aug. | Sept 
| | | | 
y aa z : at ard Veet 3 7 coral ees Set ee Se Sk POS h, yRCRE Sra 
| Station To... -aen--ce-| 20.0] 20.8) 25.0| 240/° 240] 280] 28.0)... 
| Bik ton... teas TS 0. |" 09.0 |. ern 28,8 | S38) Nol Ra ee aces 
Fg 1 Seatac veces verre 17.8] 18.5] 20.0} 22.0} 20.2] 20.0] 21.0] 20.2 
Lar NN ha ace ah tat 18.0 | 20.2 28.7) 24.8) 24.0 | 22.7 | 28.8 | 24.0 
eae be dae | 
These data in regard to temperature show, within each station, a 
rather uniform monthly average, the extremes being farther apart in 
the lowlands than they are on the slope of the mountain. In all cases 
the minima are not low, although at the higher altitude the average is 
much lower than near sea level. From an ecological standpoint this is 
important. At the same time it must be remembered that there are 
no physiological experiments which show that heat directly influences 
structure in plants; in other words, there are no ecological adaptations in 
them which can directly be traced to heat as their cause. Plants found 
in all conditions of temperature often have similar habits, all of which 
are due to their water and not to their heat relations. 
Indirectly, temperature has a great ecological effect by influencing the 
condition of the atmospheric or of edaphic moisture, which control the 
ingress and egress of water into and from the plant. Thus, a diminution 
of the temperature below a certain limit lowers the chresard. However, 
the temperature of the region under consideration is not sufficiently low 
materially to influence the latter, for in the Tropics it is only in the 
™ After February 17. 
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