There are many short streams along this coast, fed by heavy rainfalls, but they have no geographic importance and no economic value under existing conditions.
A uniformly high temperature, excessive humidity, heavy rainfalls and violent tropical storms, known as typhoons or baguios, are characteristic of the Philippine climate.
The north-west counties are extremely wet; many localities here have normal rainfalls of 60-70 in.
Symons, F.R.S., of the Meteorological Office and of the Royal Meteorological Society, has resulted in the establishment of a vast number of raingauges in different parts of the United Kingdom, and it is generally, though not always, found that the mean rainfall over a long period can be determined, for an area upon which the actual fall is known only for a short period, by assigning to the missing years of the shortperiod gauges, rainfalls bearing the same proportion to those of corresponding years in the long-period gauges that the rainfalls of the known years in the short-period gauges bear to those of corresponding years in the long-period gauges.
The most trying time-distribution of which the author has had experience in the United Kingdom, or which he has been able to discover from a comparison of rainfalls upon nearly impermeable areas exceeding woo acres, is graphically represented by the thick irregular line in the left-hand half of fig.
But, as smaller areas are approached, the excessive local rainfalls of short duration must be provided for, and beyond these there are extraordinarily heavy discharges generally over and gone before any exact records can be made; hence we know very little of them beyond the bare fact that from woo acres the discharge may rise to two or three times 300 cub.