n^S A VOYAGE TO Book V. 



XXVI. XXVII. XXVIII. XXIX. Signals of Pugin, 

 Pillachiquir, Alparupasca, and Chinan. 



The two last being the north and south extremities 

 of thebaseof Talqui, the four stations of Pugin, Pil- 

 lachiquir, Alparupasca, and Chinan, did not require 

 our attendance ; for being near the base of Talqui, 

 we daily went from the farm-houses where we lodged, 

 and observed the angles, except that of Pillachiquir, 

 to which, on account of its greater distance than that 

 of the other signals, there was a necessity for our vi- 

 siting ; but happily concluding our observations the 

 same day we reached it, there was no reason for our 

 longer stay. 



XXX. XXXI. Signals of Guanacauri, and the tower 

 of the great church of Cuenqa. 



The series of triangles, except the two last at the 

 extremities of the second base, being finished, it was 

 necessary to form other triangles, in order to fix the 

 place of the observatory where, when the geometrical 

 observations where finished, the astronomicaUvere to 

 begin. Those which fell to my lot, were a signal on 

 the mountain of Guanacauri, and the tower of the 

 great church of Cuenqa j and these angles were taken 

 at the same time the astronomical observations were 

 making. 



At the north extremity of the arch of the meridian 

 new triangles were afterwards formed, as we have al- 

 ready observed in the foregoing chapter. This ren- 

 dered it necessary for us to make choice of different 

 places on these mountains for erecting other signals 

 in order to form these triangles. The same order 

 which had been followed during the whole series of 

 mensuration, that each person should-take two angles 

 of every triangle, was observed here; and those as- 

 signed to me were the following. 



XXXII. 



^ 



