Scientific Intelligence Mineralogy . 175 
gonal planes, as in Harmotome, and the chemical composition 
differs, Dr Wollaston having found it to consist of silex, alumina, 
potash, and lime, without the slightest trace of barytes. The 
primitive form is a right rectangular prism, or a right rhombic 
prism. 
83. Remarkable Crystals of Pleonaste . — Dr Fowler has dis- 
covered in Orange County, New York, crystals of Pleonaste , 
remarkable on account of their size, their bases measuring from 
4 to 16 inches in circumference ; they are of a blackish colour, 
and in this locality, the Doctor adds, they are never less in size 
than a bullet. In the same situation, crystals of Serpentine , in 
form of a rhomboidal prism, were met with ; also large prismatic 
crystals of Chromate of Iron, some of them being one inch broad, 
and two inches long ; green, red, and brown crystals of Spinel, 
in size from a line in diameter to three quarters of an inch 
on each side of the bases. All these interesting minerals oc- 
cur imbedded in primitive limestone. In the same district, 
crystals of Scapolite of extraordinary size are met with ; Dr 
Fowler mentions crystals upwards of 84 inches in circumference. 
GEOLOGY. 
84. Notice regarding a Phenomenon observed in the Island 
ofMeleda, in the province of Ragasa . — The Island of Meleda, 
where the occurrence that we are about to relate took place, is 
situated in the Adriatic Sea, opposite the territory of Ragusa, 
of which it forms a part. Its length is seven leagues, and its 
greatest breadth one. About the middle of the island is situa- 
ted the valley of Babinopoglie, half a league in breadth, and 
surrounded with pretty high mountains. A village of the same 
name occupies the centre of the valley. On the 80th March, at 
day break, a noise was heard for the first time at Babinopoglie, 
similar to ^the report of a cannon ; which, although it appeared to 
be the result of distant explosions, caused a sort of shaking in 
the doors and windows of the houses of the village. This noise 
was heard daily after. During the three first months, the inha- 
bitants were undecided regarding the place from whence these 
noises proceeded ; some thinking that a vessel was exercising in 
the open sea, or in one of the ports of Dalmatia ; others that the 
Turkish Artillery were training in one of the towns of the Ot» 
