Chapter MI. 



Tlie ninp of Punvcnzdii is tlie cliief geographical result of 

 the Italian Expedition. This map was drawn up from data 

 coiisistlnir of numerous anji'idar measurements carried out l)v 

 the Duke from the dift'erent peaks by means of tlie prismatic 

 compass, which were completed by the mensuration of a l)ase 

 line of 300 yards taken on ground near to Bujongolo, by 

 Commander Cagni, and by him connected with Kiyanja (the 

 Edward Peak of Mt. Baker), and witli a rocky peak (Cagui 

 Peak) situated to tlie north-east of Bujongolo, from the 

 sunmiit of whicli ( 'agni himself took all the angles of the 

 peaks with a held theodolite. 



Last of all, the calculation of the longitude and latitude 

 of Bujongolo permits us to put the chain in its place on the 

 map of Africa.* 



The obseryations were taken in unfavourable atmospheric 

 conditions, nor was it possible in all cases to take them with 

 an instrument of precisioii so heavy, delicate, and cumbersome as 

 the theodolite. In spite of these di'a whacks the topographical 

 sketch may ])e considered as fairly accurate, because it is based 

 n})on numerous observations often repeated over and over again 

 at tlie same points, and which are in great part reciprocal, 

 so as to admit of mutual verification one from another. 



The rano-e of Puwenzori is situated less than half a dei>ree 

 north of the equator, and about 30° long. E. Greenwich. 



* According to the map annexed to this volume, Bujongolo is situated at 

 0° 20' 23" lat. X., and ;!0° 1' 34" long. E. Greenwich. The nnml>eis are 

 a few seconds above those given on the map which accompanies the lecture 

 of H.R.H. before the Italian Geographical Society, and pulilished in Fasc. 2, 

 Part 2, Vol. VIII of the " Bollettiiio," l)ecHUse it was only later that he 

 obtained from the Astronomical Observatory of Greenwich the necessary data 

 for the correction of the lunar tables contained in the ephemerids in order to 

 assign its exact value to the stiaight ascent of the moon. 



IKS 



