NORTHWESTERN PANGASINAN. 959 
are quite short and have small catchment areas. In spite of this 
and the small average flow, great changes are produced by 
periodical torrential storms. A heavy typhoon frequently pro- 
duces a rise of from 5 to 10 meters in the larger streams, and 
the flooding of the sea-level plains is an annual occurrence. 
Climate.—The climatic conditions have been studied by the 
Weather Bureau at Dagupan, a city some 16 kilometers east 
of the area and similar in its climate to Alaminos. 
TABLE I.—Meteorological data for Dagupan.* 
Month. Rainfall. |empera- 
Mm. °C” 
15.2 26.1 
28.5 26.6 
43.6 27.1 
49.9 28.5 
309.9 28.1 
326. 9 28. 2 
504.1 26.9 
413.9 27.1 
276.5 27.2 
235.9 27. 2 
November ---- BER See pe neene ease Swe Ree anne 89.8 26.5 
Mecemberjee sa oes eo na See See ue eae st eos o aid 11.5 25.6 
VAI nal eae eke ee een ah SY Sie eS a! PRNTRY AUS gee Se 
Mean canal oie ioe oe Eo i SE 27.1 
8 Average data for a period of seven years furnished by Father Algué, director of the 
Weather Bureau, Manila, P. I. 
Algué* states the facts as follows: 
Absolute maximum temperature in 8 years 39°.5 C., minimum tempera- 
ture recorded in same period 14° C. Range of temperature during the year 
2°.6 C. Absolute range during 8 years 15°.2 C. Mean daily range during 
January 10° C., during September 8° C. There is a distinct wet and dry 
season lasting from the end of November to March. The percentage of 
rainfall during the months of June to October, popularly called the rainy 
season is at least 76 per cent of the total precipitation per year, while 
the rainfall from November to February never exceeds 12 per cent of the 
total average. April and May are apt to have more precipitation than 
the dry months owing to electric storms and occasionally, especially in 
May, to cyclones. 
Population.—The inhabitants comprise Pangasinans and 
Tlocanos, of whom it is certain that the latter have recently 
spread out from the Ilocos provinces. The two languages are 
distinct and as yet have not had the time to produce a blend- 
*An attempt to classify the climate of the Philippines, Cablenews- 
American, Yearly Review Number (1911), 53. 
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