RECONNAISSANCE OF SOUTHEASTERN LUZON. 



467 



east-northeast, causing the death of an inhabitant near Malilipot. Next to 

 Libog, the vicinity of Carnal ig suffered the most damage as a result of the great 

 quantities of sand and stones which were brought down after the eruption by the 

 floods occasioned by heavy rains. 



cai.aguas ib,.i2'. 



SCALE 



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 MAYON V ^ _^ 

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Fig. 4. — Sketch showing the approximate area in which ashes fell during the 

 eruption of Mayon in 1897. Taken from a map by Coronas. 



Character of the eruptions of Mayon. — Von Drasche, from his observation of 

 Mayon, concluded that during its periods of activity large quantities of ashes 

 and occasional small lava flows had been erupted from the summit of the volcano. 



Abella, in his monograph, cites this opinion and then states that neither the 

 descriptions of former eruptions nor his observation substantiate this conclusion. 

 He says that small quantities of ashes, which are a purely fortuitous or 

 accidental element, are thrown out generally at the commencement of the 

 eruptions, or at the times when they increase in force. On the other hand, 

 during many days or months, large amounts of incandescent lava appear which, 

 although fragmentary and incoherent, &o\v in an almost constant manner, not 

 only from the summit of the mountain, but from the numerous fissures or 

 subordinate openings, some of the latter being nearly half-way down the slope. 

 He explains that the steep slope and the incoherent character of the materials 

 on the sides of the volcano prevent these subordinate openings from being 

 preserved. 



Mayon has been visited lately by many people, and munerous photo- 

 graphs have been taken of its features, but no one has called attention 

 to evidence of former openings or fissures below the summit. Von 

 Drasche seems to have been correct in his statements. Some of the 



