DOMAIN XII. VOLCANIC. 



year, various changes had happened to this vol- 

 cano, by the enlargement of its crater, and a 

 spacious aperture formed in its bottom. 

 Borch. Count Borch appears to have wished to ex- 

 ceed the three other travellers in brevity, rela- 

 tive to this subject; since he only tells us that 

 he arrived at the mountain on the 16th of De- 

 cember, 1776, and that the crater of Etna is 

 formed like a funnel. He adds, however, what 

 is worthy of notice, that the summit of Etna is 

 bifurcated, as I observed it to be; a circum- 

 stance not noticed by others, Sir William Ha- 

 milton even affirming that the summit of the 

 mountain is single; whence we may conclude 

 that one of these summits has been produced 

 since the time of the journey of Brydone, in 

 1770. 



" On comparing the above-cited observations, 

 made within the space of twenty-one years,, we 

 may perceive how many changes have taken 

 place in Etna during that interval; and as 

 within that time the mountain has suffered only 

 two violent convulsions, in the eruptions of 1781 

 and 1787, it is evident that even in the state of 

 apparent inaction, it still internally exerts its 

 force. 



D'Orviiie. To these observations it may likewise not 

 be without utility to add those of M. D'Orviiie. 



