{ ^52 ) 



CHAP. XIX. 



OBSERVATIONS WHICH HAVE AN IMME- 

 DIATE RELATION WITH THE VOLGA- 



NIZATION OF THE EOLIAN ISLES 



ENQUIRIES RELATIVE TO THE ORIGIN 

 OF BASALTES. 



Methods and injlruments proper to ra'ife Jlojiy 

 bodies from the bottom of the fea fiirroiind- 

 ing the Eolian ifes — The bottom of the 

 channels between Vidcano^ Ltpari^ and Sa- 

 line, entirely volcafiic — The faine obferva- 

 hie of the roots of the Eolian ifes beloiv 

 the water — Gravel and volcafiic find in 

 the channel that divides Panaria fom 

 Lipari~The rocks in the middle of the 

 channels between Saline and Felictida, and 

 between Felicuda and Alicuda, analogous 

 to thofe of the fame ifands, but, probably, 

 priniordial — Dec five proofs deduced from 

 thefe obfervations, that ihefooerls and cry f 

 talU%ed fcltfpars of the lavas have not 



been 



