[ 6i 9 ] 
fc of the mountains, and by no body elfe.” On the 
other hand, the earthquake that deftroyed Port- 
Royal extended itfelf all over the ifland : and the 
fame was obferved of a fmaller earthquake, that hap- 
pened there in 1687-83 which latter undoubtedly 
came from the fea, as appears by Sir * Hans Sloane’s 
account of it. 
8 1 . Earthquakes of fmall extent are alfo very com- 
mon amongft the mountains of Peru and Chili. An- 
tonio d’Ulloa fays, “ Whilft we were preparing for 
“ our departure from the mountain Chichi-Choco, 
<c there was an earthquake which was felt four 
“ leagues round about : our field tent was tolled to 
<c and fro by it, and the earth had a motion like 
“ that of waves ; this earthquake, however, was 
<c one of the fmalleft, that commonly happen in that 
“ country.” The fame author tells us, in- another 
place, that, “ during his ftay at the city of Quito, 
“ or in the neighbourhood of it, there were two 
“ earthquakes, violent enough to overturn fome 
“ houfes in the country, which buried feveral perfons 
“ under their ruins.” 
Sect. V. 
82. It is generally found, that earthquakes in hilly 
countries, are much more violent than thofe, which 
happen elfewhere; and this is obferved to be the 
cafe, as well when they take their rife from the 
lower countries, as amongfi: the hills thernfelves. 
This appearance being fo eafily to be accounted for, 
from the ftrudture of the earth already deferibed, I 
* See Phil. Tranf. N° 209, or Lowthorp’s Abr. vol. ii. p. 410. 
V o l. LI. 4 L Iball 
