Ch. III. SOUTH AMERICA. 235 



tacked me at Chichichoco, and increasing at Mulmul, 

 I was obliged to remain in a cow.house on that moun- 

 tain, from whence I was removed toRiobamba; and 

 this accident hindered me from being present at the 

 signals XV. XVI. and XVII. which were those of 

 Guayama, Lima), and Nabuso. 



XVIÍI, Signal of Sisa- pongo. 



At. the signal of Sisa-pongo we continued from the 

 9th to the end of November ; and here the trigono- 

 metrical observationswereintermitted till Don George 

 Juan and M. Godin returned from Quito, to which 

 city they repaired in order to take some measures ne- 

 cessary for the continuation of the work. But, that 

 this interval might not be lost, M. Bouguer pro- 

 posed to make some experiments, in order to demon- 

 strate the system of attraction. The place he made 

 choice of for these experiments was the mountain of 

 Chimbarazo. In this station, and the following of the 

 sandy desert of the same mountain, we suffered more 

 than on any other. I 



XIX. Signal of Lalanguso. 



On the desert of Lalanguso, our observations were 

 continued from the 24th lo the 31st of January 1739. 



XX. Signal on the desert of Chusay. 



The station on the desert of Chusay was one of the 

 most tedious in the whole series of triangles, being un- 

 avoidably detained on this disagreeable mountain from 

 the 3d of February to the 24th of March. This de- 

 lay was occasioned by the difficulty of pitching on pro- 

 per places for erecting thcsucccedingsignals, that they 

 might stand in full view, be easily distinguished one 

 from another, and form regular triangles, Tnis was 

 indeed a difficult task, the lofty summits of the moun- 

 tains of the Cordillera of Azuay, where they were to 



be 



