17
V. RAINFALL RECORDS.
The following tables give the registered monthly rainfall of all the permanent and temporary,official and voluntary, meteorological stations in the Archipelago. Although the records of many ofthem are. very incomplete, it has been considered useful to include even these. The interruptionof five or six years, which most of the records show, corresponds to the periods covered by the Fili-pino insurrection, the Spanish-American war. and the disturbances following the latter. It wouldhave been very desirable, indeed, to reopen all the old stations at which the rainfall had beenrecorded at any time during the years preceding these events, hut this has not been possible thus far.
It nnist he stated that the mean annual totals found in the tables are the sums of the monthlyaverages, not those of the figures in the column of the annual rainfall, as in many cases the latterare wanting because the records are incomplete, those for several months being missing. Theihonthlv averages have not all the same relative value, since in several cases they arc based upondifferent numbers of years.
As to the order of the 1 tables, we considered it advisable to arrange them according to thefour meteorological districts into which the Archipelago is divided. The first district comprisesthe part lying south of the twelfth parallel and east of the meridian 12:1° lit)'. The second includesthe islands and seas extending west of the first district. The third is formed by the part of Luzonand the Yisayas lying north of the twelfth parallel and east of the one hundred and twenty-secondmeridian. Finally, the fourth district embraces the region west of the third : that is to say, thegreater part of Luzon and the Island of Mindoro.
The latitudes and longitudes are taken from the current maps of the Philippines. Manyof them are only approximate as regards minutes of arc, especially of stations in the interior ofislands, as no geodetic survey has as yet verified their geographical positions.
For the most part the elevations of the stations above sea level have been calculated by meansof barometric observations only.
MONTHLY RAINFALL AT ALL STATIONS IN THE PHILIPPINE ISLANDS.
DAVAO.
[Latitude, 7° 01' north: longitude, 125° 35' east. Altitude, 3 meters.]
Millimeters of rainfall.
1 Years.
1
Jan-
uary.
Feb-
ruary.
Mareh.
April.
May.
J line.
July.
August.
Septem-
ber.
October.
Novem-
ber.
Decem-
ber.
Total
annual.
1897-
1898..
397. 8169.2
142. 1107.5
20. 9121
148 9
loti
247. 8
208. 1
155. ;>
179.5
111.5
148
287
166
159.5
234. 8
66. 6
208. 5
1,959. 1
1902
28. 4
69
127. 8
163.5
256. 7
196
242.8
50. 7
118.4
62. 7
112
1903..
22. 1
159. 7
18.7
181. 8
127.6
111.2
224. 3
121
168. 2
169.9
171
136. 7
1,612.2
1904..
115.2
118
179. 6
285. 4
228. 3
276. 7
187.5
173
177. 5
289. 3
199.6
99. 3
2, 329. 4
1 1905-
79
121.4
206. 2
88. 4
417.8
192. 8
341.4.
328. 3
160. 6
127. 3
66. 5
_
_
'1 1906-
—
98. 7
211.2
188.9
180.9
234. 6
283. 5
229. 4
182.6
209
203. 7
175. 5
—
Mean
156. 7
111). 8
118.1
170.8
195. 1
209. 7
246. 8
202. 3
149.8
191.6
128.4
146.4
2, 026. 5
COTABATO.
[Latitude, 7° 13' north; longitude, 124° 12' east. Altitude, 5 meters.]
1903 .
1904
85. 9160
68. 1156. 7
72.9258. 1
212. 8222. 2
251.7283. 7
350
187. 2
133. 1239. 5
285274. 3
371. 195. 7
193 _
55.9 __
1905
57. 7192. 7
52. 2
243. 2
103. 4
1906.
16.4
52.4
61
295.9
136. 5
300. 1
313.2
268. 1
197.2
... . _
Mean
16. 4
99. 4
95. 3
145.4
195.8
224
297. 8
250. 2
213. 6
252. 2
233. 4
117.4 i 2,140.9