ILLUSTRATIONS. 



Plate I. 



Sketch showing the geologic mapping of southwestern Luzon by Von Drasche. 



Plate II. 



Fig. 1. Crater of Taal Volcano seen from the east. 



2. Crater of Taal Volcano seen from the southeast, the 1904 crater in the 

 left foreground. 



Plate III. 



Fig. 1. The 1904 crater blowing out steam and gases July 4, Red Lake in fore- 

 ground. Photograph by Dean C. Worcester. 



2. The 1904 crater erupting stones. July, 1904. Photograph by Dean C. 



Worcester. 



3. Panorama of Taal crater. New crater formed in 1904 shown to the 



left. 



Plate IV. 



Fig. 1. The 1904 crater, showing erupted mud. 

 2. The 1904 crater quiet. 



Plate V. 



Fig. 1. Erosion on outer southern slope of the crater of Taal. 



2. Erosion on eastern inner slope of Taal, showing bedding in crater rim. 



Plate VI. 



Fig. 1. Napayong and Bubuing Islands in Taal Lake, as seen from Lipa Point. 

 2. The cone Binintiang Malaqui on the northwest point of Taal Island. 



Plate VII. 



Fig. 1. Marine conglomerates, small island near Corregidor. 

 2. Agglomerates, rapids in Pagsanjan. Gorge. 



Plate VIII. 



Taal Volcano as seen from Bauaderos when the steam rises in the morning. 



Plate IX. 



Maquiling Mountain, as seen from the railway station at Santo Tomas. 



Plate X. 



Gorge east of Montalban, site of Manila waterworks dam. 



Plate XL 



Alluvial lands, east border of Bay Lake. 



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