86 PRATT. 



Plate X. 



Fig. 1. Eruption during the afternoon of January 30, 1911, showing cloud sweep- 

 ing down the volcano slopes. 

 2. Mud and stones in eruption, January 30, 1911. 



Plate XI. 



Fig. 1. Showing the effect of the mud blast on trees at Gulod, 8 kilometers from 

 the crater. Natural size. 

 2. Fragment of "bread crust" bomb, showing re-fused appearance of the 

 crust and original scoriacious texture of interior. The bomb from 

 which this fragment came measured about 1 meter in greatest diameter, 

 and fell about 1 kilometer away from the crater rim. 



Plate XII. 



Fig. 1. Casaysay Church in town of Taal damaged by earthquakes. Looking 

 northeast. 

 2. General view near barrio of Bayungan showing destruction wrought. 

 Looking north. 



Plate XIII. 



Fig. 1. Fissure in town of Lemery. Looking east. 



2. Fissure near the barrio of San Nicolas. Looking south. 



Plate XIV. 



Fig. 1. View inside the crater, February 26, 1911, showing the obelisk-like mass 

 uncovered by recent activity. 

 2. Stream flowing into new crater lake, from seepage through crater walls. 

 February 26, 1911. 



text figtjbes. 



No. 1. Map of a portion of southwestern Luzon showing area covered by mud • 

 from the eruption of Taal Volcano, January 30, 1911. Three roughly 

 concentric areas are shown. 



Outside the largest area the mud-fall was less than about 1 millimeter. 



Outside the intermediate area the mud-fall was less than about 1 

 centimeter. 



Outside the smallest area the mud-fall was less than about 10 centi- 

 meters. 



2. Vertical section of the fall of mud on the southwest slope of Taal Volcano. 



3. Diagrammatic section across the Pansipit River Valley showing position 



of earth fissures. 



