[ 5 8 ° ] 
“ as it happened in the cafe of the mountain 7rr Car- 
“ guayrafo. This fhock, which we may, without 
“ the lead; impropriety, call an earthquake, is fel- 
“ dom found to accompany the eruptions, after an 
“ opening is once made j or, if fome imall trembling 
“ is perceived, it is very inconfiderable j fo that, 
“ after the volcano has once found a vent, the fhocks 
“ ceafe, notwithftanding the matter of it continues 
« to be on fire.” The greater earthquakes, there- 
fore, feem rather to be occafioned by other fires, that 
lie deeper in the fame trad; of country ; and the erup- 
tions of volcanos, which happen at the fame time 
with earthquakes, may, with more probability, be 
afcribed to thofe earthquakes, than the earthquakes 
to the eruptions, whenever, at leaf!;, the earthquakes 
are of any confiderable extent. If this don t appear 
fufficiently manifeft at prefent, it will, perhaps, be 
better underftood, by applying to the prefent pur- 
pofe, what will be faid hereafter concerning local 
earthquakes. 
* It does not appear altogether certain, from the expreffion 
made ufe of in the French tranflation (from whence I ha\e taken 
this), that Carguayrafo might not have been a volcano in former 
times, which is aflerted to have been the cafe by Monf. Conda- 
mine. It is poffible alfo, that the fame may be true of thofe four 
mentioned in the next article ; and, indeed, it is difficult to know 
it to be otherwife, in any inftance, among the Andes, where the 
volcanos are generally found at inacceffible heights. But allowing, 
that all thefe were only old volcanos, which broke out afrtfh, yet 
they will ferve at leaft to fwell the number of them in the fame 
neighbourhood, as well as to fhew us, that there may, very 7 pro- 
bably, be many more, which lie hid : for thefe fhewed no marks 
of their exiftence, till, by their eruption, they melted a vaft quan- 
tity of fnow, with which they were before covered, and which, 
being reduced to water, did great damage, by overflowing the 
country round about. 
