MINBU. 4t 



or southern vent, 5a, formed a circular crater of about 5 feet in dia- 

 meter, in which the mud did not quite rise up to the rim, but remained 

 about 5 inches below it. It flowed off through a small break at 

 the western side. Gas bubbles were large and frequent. The 

 temperature was 78 F. 



The northern or older vent $b formed a crater of about three 

 and a-half feet in diameter, filled to the rim with very viscous mud, 

 in which small gas bubbles rose. At long intervals a stronger eruption 

 took place, when the mud overflowed ; the temperature was 78 F. 



Between the two was a third vent, 5c, of about afoot and a-half in 

 diameter filled with very liquid mud, which did not reach up to the 

 rim ; gas bubbles rose, but not frequently ; the temperature was 75 F, 



From the above description we see that this mud volcano under- 

 went great changes with regard to its shape ; from being a single 

 vented cone in 1888 it changed to a double cone in 1895. 



No. 6. — Rather less than 200 feet north of the former the last 

 of the cone rises to a height of about 35 feet. In its general shape it 

 resembles the No. 30 ; in 1888 it was only feebly active. There were 

 two vents on the top, from which a small stream of mud flowed with a 

 temperature of 75 F. The same two vents were seen in 1889 ; the 

 northern being the smaller of the two. There was no stream of mud 

 flowing, but occasional flakes of mud were thrown out of the 

 vents. In 1895 there was only one vent at the top, of about 6 inches 

 in diameter, filled with a very viscous mud which did not reach the 

 rim. Occasionally gas bubbles rose, spurting out small flakes of 

 mud. The temperature of the mud was 75 F. A small vent at the 

 northern foot contained very liquid mud of 78 F. 



The mud volcano has not suffered any changes in its general 

 shape since 1888, although it is quite certain that the vents have 

 shifted. 



No. 7. — This is an irregular basin filled with muddy water up 

 to about 2 feet below the rim, west of No. 4, but not strictly 

 speaking, belonging to the group Nos. 3 to 5, its physical 

 appearance being more related to Nos. 1 and 2. Gas bubbles are 



( 87 ) 



