﻿Vol. 6 1.] NORTH- EASTERN TERRITORIES OE THE CONGO FREE STATE. 645 



Djabbir — Likati. 



Prom Bima to Djabbir the Uelle takes a more north-westerly 

 direction, and its course is interrupted by an immense number of 

 rapids. We had no opportunity of visiting that part, but from the 

 information gathered it would seem that granite is the prevalent rock. 



A remarkable feature of that stretch of country is the peculiar 

 direction, as well as the proximity of the course of the Likati Eiver 

 in its upper part, to that of the Uelle itself, there being an interval 

 of not more than 15 miles between the two rivers. 



Commandant E,oget is said to have found a stanniferous 

 diabase on the banks of the Uelle and in the neighbourhood of 

 Djabbir. We have been unable to verify this, and in the portion 

 visited by us we never saw any stanniferous rocks. 



Bima — Bomokaudi. Poko — Zobia. 



The distance between Bima and Bomokandi is given as 81 miles 

 (teste Lema,\re) by the waterway, the difference of level between the 

 two places being about 82 feet. 



As we travelled this route by canoes at the highest flood- time, 

 little information could be gathered, except to show that the country 

 was entirely granitic in its nature. At the numerous and strong 

 rapids encountered, blocks and masses of granite were much in 

 evidence, and near Bomokandi we noticed that the granite formed a 

 ridge running north-west and south-east. 



On the road followed overland from Poko to Zobia, and thence to 

 the Rubi on our return-journey, we obtained a new traverse of the 

 same country, but farther south. Here again granite was the 

 prevalent rock, being principally found in the depressions and beds 

 of streams, and mostly in isolated blocks buried in clay. In places, 

 the lower portions of the grey argillaceous deposit, as the underlying 

 granite was approached, became more and more like kaolin, and we 

 observed that it was often used as whitewash for houses. 



Above the kaolinized surface-deposit, which we take to represent 

 the decomposed granitic substratum, we noticed a formation over- 

 lying it and distinct from it, which appears to be widely distributed 

 throughout the Uelle district: a limonitic puddingstone, to 

 which I shall refer again (p. 649). 



From Bomokandi to Amadi the distance overland is about oo miles, 

 but the Uelle follows a more circuitous course to the north, bending 

 round in the shape of a great bow. The altitude of the Uelle, 

 which at Bomokandi is 2034 feet, is found at Amadi to be 2240 feet, 

 and the fall of the river therefore is a little more considerable ; 

 moreover, at the rapid of Panga is a waterfall, though of no great 

 size. I have been informed from reliable sources that the waterfall 

 is formed by a diabase-dyke 100 feet wide, striking W.N.W. and 

 E.S.E. I was unable to verify this interesting point, or to gather 

 more details about it, as I had to follow another route. 



Nearer Amadi, granite is in evidence, forming several rapids 

 in the vicinity. 



