On the Caufe oflBarthqiiaies. 539 



iflcf?, the Great Anulles, and all the other exlenfive Iflands 

 of the globe, experience earthquakes in the fame manner as 

 continents ; that is to fav, with more violence in the diftri6l3 

 which front the weft and the I'outh, than in thore which look 

 towards any other quarter. 



6. Small iflands, in confequence of their fmall extent, feel 

 the effe<9:s of earthquakes almott in an equal manner through- 

 out all their parts : it is obfer\'ed, in particular, that the moft 

 violent fliocks are ahvavs towards the weft and louth, 



7. Parts of the earth confined between two feas, as tht 

 ifthmuses of Porto Bello, Suez, and feveral others, experi- 

 ence the eftedls of earthquakes on the two oppofite fides. 



8. In a great extent of coaft which looks towards the 

 north, when changes of direftion occur fo as to look towards 

 the weft, as that of the northern part of Africa towards Oran, 

 or as that of the giilph of Marccavbo, earthquakes are accom- 

 panied with ;)CcuUarities analogous to their pofition ; that is 

 to fay, thofe parts of the coafts which look towards the weft: 

 are fubjeft to very violent earthquakes. 



9. Small iflands lying to the weft or fouth of continents, 

 or of other iflands much larger, experience very violent 

 fhocks. Several iflands which were in this fituation have 

 difappeared in confequence of violent earthquakes, by which 

 they were fwallowed up in the fea. 



10. Among the coafts which face the weft or the fouth, 

 there are places where earthquakes are felt with more violence 

 than in others : it is alnioft always in thefe places that the 

 moft violent ftiocks are repeated. 



11. Great earthquakes are almoft alwavs preceded and fol- 

 lowed, fome time before and after, bv fmall (hocks. 



13. Two earthquakes have often taken place on the fame 

 dav at two places at a confiderablc diftance, and feparated 

 from each other by fea or by intermediate lands which have 

 not experienced the leaft fhock. 



13. Great earthquakes almoft always take place after long 

 rains. 



14. Earthquakes have often been followed by malignant 

 fevers and epidemical dileafes. 



15. Earthquakes are fomttimes preceded or followed by 

 hurricanes. 



16. VVe had a very violent hurricane at Cape Francois 

 about an hour before the famous earthquake on the 3d of 

 June 1770. This hurricane came from tbc mountam called 

 La Charbonieie, more than 40 leagues dirtant from the Cape. 

 The e.irlhquake overturned this mountain, fo that many of 

 the inhabitants, negroes, and cattle, were fwallowed up. 



Ya 17. The 



