144 THE LAKE REGIONS OF CENTRAL AFRICA. 



1833, in which the learned author refers the ebb and 

 flow of the waters of Lake Leman, or of Geneva (and 

 of the lakes of Zurich, Annecy, and Constance), to a an 

 unequal pressure of the atmosphere on different parts 

 of the lake at the same time ; that is, to the simul- 

 taneous effect of columns of air of different weight or 

 different elasticity, arising from temporary variations of 

 temperature, or from mechanical causes." 



The scenery and the navigation of the Tanganyika 

 have been illustrated in the last chapter. Remains 

 only a succinct account of the physical and ethnological 

 features of its Periplus, carefully collected from autho- 

 rities on the spot. 



According to the Wajiji, from their country to the 

 Runangwa or Marungu River, which enters the Lake at 

 the southern point, there are twelve stages ; this Peri- 

 plus numbers 120 khambi or stations, at most of which, 

 however, provisions are not procurable. An extended 

 list of fifty-three principal points was given by the 

 guides ; it is omitted, as it contains nothing beyond 

 mere names. There are, however, sixteen tribes and 

 districts which claim attention : of these, Ukaranga and 

 Ujiji have already been described. 



The kingdom of Urundi, which lies north of Ujiji, 

 has a sea-face of about fifty miles ; a low strip of ex- 

 ceeding fertility, backed at short distances by a band of 

 high green hill. This region, rising from the Lake in a 

 north-easterly direction, culminates into the equatorial 

 mass of highlands which, under the name of Karagwah, 

 forms the western spinal prolongation of the Lunar 

 Mountains. The residence of the Mwami, or chief 

 sultan Mwezi, is near the headstream of the Kitangure 

 (Kitangule), or River of Karagwah, which rises at a 

 place distant six days' march (sixty miles), and bearing 



