( 295 ) 



II. This lava is found at about one 

 quarter of the afccnt up the mountain,, 

 and continues to the top : it is alfo met 

 with in detached pieces along the declivi- 

 ties. The bafe of this lava is a compact, 

 heavy trapp, of very fine particles, inter- 

 rupted with feltfpathofe fcales. It has the 

 black colour of iron. The furnace changes 

 it into an enamel full of bubbles ; but it 

 retains its former colour. 



III. This fpecies is in part bilried with- 

 in the lava No. II ; and, in part, ifliies 

 from it, forming tortuous veins of various 

 fizes, and running in various directions, 

 one of which interfecfls the decompofed 

 Xatreous lava No^ III. The bafe of this 

 lava is an extremely compa(Sl petrofilex ; 

 it is of a fine grain, accompanied with 

 micaceous and feltfpathofe cryftals. It 

 is of a greyifh blue colour, inclining to a 

 black. Its fufion in the furnace was com- 

 plete at the end of thirty-eight hours. 



IV. This lava is white, light, and de- 



TT 4 compofed 



