﻿150 SMITH. 



Record of rainfall, front the meteorological station at Vigan, llocos Sur. 



Millimeters. 



January 



February 



March 22.0 



April 10.0 



May 22.3 



June 003.3 

 July (missing). 



August 558.1 



September 517.5 

 October ( missing ) . 



November 4.1 



December 15.5 



Total 1,844.0 



Or 72.5 inches. 



The month of September was particularly unfavorable for my visit 

 to this province, but circumstances forced me to go at that time or other- 

 wise indefinitely delay the trip. It might be a matter of interest to 

 state that we experienced three quite severe typhoons during that month, 

 one of these being the one which descended so disastrously upon Hong- 

 kong. Fortunately, we were on the outer rim of this cyclone, but even 

 as it was we were afforded an ocular demonstration of what the sea can 

 do along this coast and the necessity of changing ports with the change 

 of monsoons. 



One very noteworthy effect of the high seas was the damming and 

 backing of water in the lower courses of the rivers by the high waves, 

 thus greatly increasing the difficulties already attendant upon travel and 

 the transportation of supplies. 



GEOLOGY — GENERAL. 



IGNEOUS. 



• ♦ 



Four totally different classes of igneous rock, as follows, were encoun- 

 tered in the region which I covered : 



A. Dolerite (f. n.), more precisely speaking a pyroxenite. Basal 



and plutonic. 



B. Granulite — a muscovite granite-intrusive. 



C. Andesite — extrusive. 



D. "Eruptive conglomerate" — extrusive. 



THE PYROXENITE. 



This rock is the basal formation, so far as I know, of the region. In 

 some places it is deeply buried, and is to be seen only in deep cuttings in 

 the streams, in others it is exposed on the highlands on the surface where 

 the overlying sedimentary beds have been removed. It is seldom found 



