ULLOa's voyage to south AMERICA. 437 



they finiftied the obfervations, with that accurate precifion fo confpicuous m all their 

 operations. 



VI. — Signal on the Cordillera and Defert of Guamani. 



They were obliged to make two journeys to the mountain of Guamani, the fignal 

 having been firfl mifplaced, fo as not to be feen from that ereded on Corazon ; and 

 confequently there was a neceffity for removing it. And though, in order to do this, 

 they afcended the mountain on the 2 8 th of January, they found it neceflary to return 

 thither on the 7th of February, when they were fortunate enough to finifh every thing 

 remaining the very next day. 



VII. — Signal on the Defert of Corazon. 



This mountain alfo the gentlemen were obliged to vifit twice ; the firft journey was 

 on the 20th of January, and the fecond on the 12th of March 1738. 



VIII. — Signal of Limpie-pongo, on the Defert of Cotopaxi. 



They went up to the defert of Cotopaxi on the 1 6th of March, and remained there 

 till the 31ft; when they obferved that the fignal of Guamani was not vifible from 

 thence, and therefore it was neceffary to ereO. another in the intermediate fpace ; which 

 being completed on the 9th of Auguft, they again repaired to the fignal of Limpie- 

 pongo, on Cotopaxi ; where they finifhed all their operations by the 1 3th of the fame 

 month, and left every thing in exa£i: order. In afcending the mountain in this fecond 

 journey, the mule on which Don George Juan rode fell down a breach four or five 

 toifes deep, but providentially without receiving the leaft hurt. 



As they had been obliged to ere6t another fignal between thofe of Guamani and 

 Limpie-pongo, in order to continue the feries of triangles ; fo there was alfo a neceffity 

 for returning to fome ftations, to obferve again the angles which had before been deter- 

 mined. Thefe operations, together with the experiments on the velocity of found, 

 and the obfervations at the new fignal, filled up the interval from the time the operations 

 were fufpended on Limpie-pongo, till they returned to finifh them. 



IX. — Signal on the Defert of Chinchulagua. 



The operations of the fignal of Chinchulagua, ereded on the defert of the fame 

 name, were completed on the 8th of Auguft ; but a doubt arifing with regard to one 

 of the angles obferved, for the greater certaintv, they returned to this ftation, and again 

 examined the angle in queftion, after they had finifhed their obfervations at Limpie- 

 pongo. 



X. — Signal on the Mountain of Papa-urco. 



After verifying the obfervation on Chinchulagua, they removed to the fignal of 

 Papa-urco, and finifhed their obfervations in the fame month of Auguft. Here they 

 for fome time fufpended their operations, being called to Quito on affairs of importance, 

 relating to the French academicians. 



XI. — Signal on the Mountain of Milin. 



The affairs which had required M. Godin*s prefence at Quito being terminated within 

 the month, they returned, on the ift of September, to make the neceffary obferva- 

 tions 



