Chapter VII. 



The map of Kiiwcuzoii is tlic cliief geographical resuU of 

 tlie Itahaii I^x|)e(hti()n. This map was (h'awii up from data 

 consistiiii;' of iinmcrous annular measurements carried out hv 

 the Duke from llie diH'ei'ent peaks l)v means of the |)rismatic 

 compass, wliicli wei-e completed 1)V the liiensuration of a hase 

 line of MOO yards taken on ground near to Bujongolo, hy 

 Commander Cagni, and hv liim connected with Kiyanja (the 

 Edward Peak of Mt. Baker), and with a rocky peak (Cagni 

 Peak) situated to tlie nortli-east of Bujongolo, from tlie 

 summit of which ('agni himself took all the angles of the 

 peaks with a tield theodolite. 



Last of all. the calcidation of the longitude and latit\ide 

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

 ]nap of Africa.* 



The ohservations were taken in unfavo\n'ai)le atmospheric 

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

 an msti'ument of jirecision so heavy, delicate, and cumhersome as 

 the theodolite. In s])ite of these draw'hacks the topogra})hical 

 sketch mav he considered as fiirlv accurate, hecause it is hased 

 upon numeious ohser\ations often repeated oxer and over again 

 at the same pomts. and which are in great part reciprocal, 

 so as to admit of mutual \erification ont^ from anotlier. 



"^riie i-aii"f of Ivuw'eiizori is situated less than half a deo-ree 

 north of the etpiator, ami ahout 30^ long. E. Greenwich. 



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

 0° 20' 2.'V' lat. N.. aiid •!() 1' .'U" long. E. (Ireenwicli. The iuun1»ers ave 

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

 of H.K.H. before the Italian Geographical Society, and published in Fase. i\ 

 Part L', Vol. YIII of the "Bollettino." because it was only later that he 

 o1>tained from the Astronomical 01)servatory <>f (Tieenwich the necessary data 

 for the correction of the lunar tables contained in the ephenierids in oi'der to 

 assign its e.xact vahic to the stiaiglit ascent of the moon. 



lilS 



