Essay, Ga. 26; 
* more recent origin than those which are found in 
the central ranges, in conjunction with the hills, 
formed by a deposition from water, and at a 
greater distance from either of the principal 
volcanic points which have lately been in action. 
lt appears indeed probable that they were 
ejected by an eruption comparatively late, in as 
far as relates to the general arrangement of the 
strata of this Island: their character is different 
from those of Ujung-agung and Bedagangan 
above mentioned, which belong to the submarine 
lavas, and I shall soon point out the traces of a 
very extensive stream which flowed ina S. S. W- 
direction from the mountain. It has, however, 
appeared to me that the Tufa which principally 
composes this tract has a still more recent 
origin, and if many of the lavas must be con- 
sidered to have been formed under the ocean, 
this tufa appears to be a mere mechanical ag- 
. glutination of the substances of one of the 
later eruptions. Proceeding westwards from 
Purwo-korto I passed several of the projections 
from the central ranges, running out before the 
foot of the large mountain, and the indica- 
tions of the Tufa were gradually lost. At 
Ajibarang che vicinity of an active volcano, 
already indicated by the detached fragments in 
the rivers of Banjaran and Lo-gowok, was more 
strongly exhibited: near the declivities of se- 
veral of the ridges just mentioned, I traced, 
South of the chief village of this district, a 
stream of lava which appears to have flowed 
from the mountain in this direction: the vesu- 
ges of it covered an extensive tract in a de- 
* Exp. Cat, NG 3t. 
