﻿ILLUSTRATIONS. 



Plates I, II, and Plate III, fig. 2, and Plate IV, fig. 1, from photographs by 

 Worcester. 



Plate III, fig. 1, and Plate IV, fig. 2, from photographs by Freer. 

 Plates V and VI from photographs by Bacon. 



Plate I. 



Fig. 1. View from the eastern shore of Lake Bombom across to Taal Mountain. 

 2. View of Taal volcano from Lake Bombom, which completely surrounds the 

 mountain. 



Plate II. 



Fig. 1. Eruption of Taal volcano of July 5, 1904. Note the position of the boiling 

 lake to the right of the erupting crater. 

 2. Another phase of the eruption of July 5, 1904. This eruption was char- 

 acterized by the large amount of mud ejected causing, at its height, a 

 violent mud shower. 



Plate III. 



Fig. 1. The same crater in September 1904. The eruption has almost completely 

 died down. The boiling crater lake is shown on the right of the active 

 cone. 

 2. The same crater on December 31, 1905. Almost all signs of activity have 

 now disappeared and the crater is filled with water. 



Plate IV. 



Fig. 1. Panoramic view of the whole crater of Taal volcano on December 31, 1905. 

 2. View across the boiling crater lake showing the stratified walls surround- 

 ing it, and the salt deposits on these walls, December 31, 1905. 



Plate V. 



Fig. 1. Panoramic view of the whole crater of Taal Volcano on March 4, 1907. 

 The crater active in the eruption of July 4, 1904, and full of water 

 on December 31, 1905, is now seen to be dry and totally inactive. The 

 boiling crater lake is increased in area, while the green lake has de- 

 creased in size. A new disturbance area seems to be breaking out to 

 the left of the boiling crater lake. 



2. View looking toward the boiling crater lake. In the foreground arc seen 



some of the small pools referred to as the north beacli of this lake. 



3. The peculiar formation of colored, boiling pools separated by a crust of 



iron salts, called the north beach of the boiling crater lake. 



Plate VI. 



Fig. 1. View looking down from the north upon the yellow lake, the two fumaroles 

 and the boiling crater lake. 



2. Looking down from the north upon the boiling crater lake. In the 



foreground is seen the peculiar formation of the north beach of this lake. 



3. The two fumaroles at the head of the green lake. The yellow lake dis- 



cussed in the former paper was situated to the left of these fumaroles. 

 It is seen that no trace of it remains. 



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