Foragn Notices in Mineralogy, &c. 27 
common in the calcedonies of other localities; and it is 
covered with a thin layer of green earth. 
I have one very beautiful specimen of jasper, composed 
of alternate layers of red, brown, white, and grass green. 
Among some specimens, which the captain of the vessel 
told me he picked up “ on the summit of a lofty mountain,” 
I observed three or four small pieces of selenite. _ 
Coal and arsenical iron pyrites were also found in these 
islands. 
The specimens of crystallized quartz brought here, were 
numerous, and many of them of great beauty. 
Most of these minerals, as I was informed, were picked 
up *‘ loose on the shores of the islands,” but many were ob- 
tamed by “ digging into the rocks.” 
2. Notices from the Edinburgh Philosophical Journal. 
* Rock crystals containing nine globules of water formed 
and forming, in decaying granite in Elba—The granite of 
Elba is sometimes traversed by fissures, and these fissures 
are frequently filled with a disintegrated granite, in which, 
we are told, are daily forming rock-crystals, nearly all of 
which contain bubbles of water ; and sometimes there ap- 
pears a vegetable-like matter floating on the water.” 
** Strontites and precious opal, &c. in the Ferroe islands.— 
Vargas Bedemar, who has lately spent a year in examining 
the geognostic structure of the Faroe islands, discovered 
strontites, in secondary trap; also opal, most frequently the 
precious kind, and but rarely the common or semi-opal ; 
and he mentions having found adularia, helictrope, and black 
Mint also in the trap-rocks.” 
*¢ Mohs’s charactertstic.—An English translation by Pro- 
fessor Mohs himself, of his characteristic, or characters of 
the classes,Orders,Genera, and species of minerals, has been 
lately published at Edinburgh. This classical work is but 
ibe forerunner of the system of crystallography of this pro- 
found naturalist.” 
“© Hausmann’s New Mineralogical Work.—Professor 
Hausmann, we understand, is at present printing a large 
