594 
SECOND REPORT— 1832 . 
brown obsidian and pumice. Minute crystals of felspar are ob¬ 
served in the obsidian. All the scoriae accompanying this lava 
are cellular and vitreous, showing layers of obsidian and pumice. 
The volcanic action which opened this crater appears to have 
entirely ceased, and no fumaroli are observed about it, though 
the lava has a very recent appearance. 
Not far from the village of II Bagno, at rlie foot of the moun¬ 
tain of that name, are hot springs (70° R.), from which much 
carbonic acid gas is extricated, flowing into a lake ird of a mile 
in diameter, milk-warm, soapy to the touch and to the taste. 
The water contains much muriate of lime, with small quantities 
of sulphur and alkaline carbonate ; it is employed for bleaching 
linen. The mountain of II Bagno, rising 300 feet above the sea, 
is a volcanic cone, with a well-defined crater, half filled with 
detritus, from which a current of vitreous lava, passing into 
resinous obsidian, and containing in geodes miscroscopic crystals 
of a yellowish white colour, has descended toward the N.E. 
Not very far from this, another current of lava show's chloritic 
cla}^, with laminae of felspar. Neither of these currents of lava 
exceeds 8 or 10 feet in depth. 
The mountain called Area della Zelia is another volcanic 
cone, with the remains of a crater upon its summit, perfectly 
circular, about 50 feet in depth ; covered with vegetation ; 
everywhere exhibiting trachytic lavas, partly pumiceous and 
partly vitreous ; externally scoriaceous; and inclosing great 
masses of pearlite and felspar. 
Monte Saterno, and several other smaller hills, are all vol¬ 
canic cones, independent of each other, and appear to have been 
successively elevated on bases of lava and volcanic substances, 
ejected from the primary cone of the Monte del Bosco. 
The shores of Pantellaria are composed of alternating lavas, 
mixed with breccia, detritus of scoriae, pumice, and puzzolana, 
conglomerated with sand. The entire S.W. coast consists of 
trachytic lava, gradually passing into obsidian, &c. To the N.E. 
a bay, indented by basaltic caverns and surrounded by lavas of 
all descriptions, forms the principal part,—if part it can be 
called,—of the island. In all the spaces that intervene betw een 
the different currents of lava throughout the whole island, are 
beds of pumice and scoriae, united with sand and pebbles of 
lava and obsidian. x4mongst them, at La Codia di Scaviri Supra, 
are found great masses of granitello, composed of crystals of fel¬ 
spar and pyroxene, and some small pieces of perfect granite. 
In the detritus of all these materials, vegetation thrives luxu¬ 
riantly. The mountain of II Bosco is entirely covered with ever¬ 
green oak and shrubs : the island produces wine, the ordinary 
