( y3 ) 



exiftence of fire in this iflaiid, I determined, 

 the next day, to make the circuit and ex- 

 amine the fhores of it, in the fame manner 

 as I had proceeded in the other iilands. 



Felicuda is nine miks in circumference, 



I began the circuit of it hj examining the 



lavas that border the fmall bay which I 



entered. Thefe have for their bafe the 



feltfpar, v^^hich is of a fcaly confiftence, a 



light grey colour, not very compact, but 



giving a few fparks v^ith ft eel and attrading 



the magnetic needle. Within its fubftance 



are included needles of black and fibrous 



fhoerl, and fmall pieces of feltfpar, which 



are eaiily diftinguilhable from the 'bafe by 



their whitenefs, femitranfparence and luftre. 



A part of the fhores of the bay are com- 



pofed of this lava with deep fiflures running 



lengthwife, as we fee in many other lavas. 



A number of round vacuities are likewife 



obfervable in it. They are of confiderable 



depth, and give it the appearance of a 



honey- comb. I rather incline to afcribe 



them to the adion of elaftic gafeous fub- 



ftances. 



