19 
varieties of the slalagmitical quartz , also called 
quartz sinter. The most remarkable among these 
are the siliceous concretions deposited by the cele¬ 
brated hot spring in Iceland, the Geyser, one va¬ 
riety of which is called siliceous tuf^ the other 
calcedonic sinter . Another variety of it is the pearl 
sinter from Santa Fiora in Tuscany (whence it 
obtained the name of Fiorite), and from the 
island of Ischia. To this may also be referred 
the ceraunian sinter , or those enigmatical silice¬ 
ous tubes which were first found in the sands of 
the Senner heath, in the county of Lippe (where, 
from their supposed origin, they are called light¬ 
ning tubes), and subsequently, under similar cir¬ 
cumstances, at Drigg, on the coast of Cumber¬ 
land, which is the locality of the specimen here 
deposited. [See also British Coll.]— The hyalite 
is placed here, as a mineral related both to sta- 
lagmitical quartz andcalcedony.—The rest of this 
table-case and the greater part of the following 
are occupied by calcedonic substances. Among 
the specimens of common calcedony , the most re¬ 
markable are, the smalt-blue variety from Felso- 
banya in Transylvania, crystallized in cubes; the 
branched and stalactical calcedony from Iceland, 
&c.; the botryoidal from Ferroe; nodules includ¬ 
ing water (enhydrites) from Monte Berico, near 
Vicenza, where they occur in volcanic rocks: cut 
and polished pieces of calcedony, with black and 
red dendritic and other figures, commonly called 
c 2 mocha 
SALOON. 
Nat. Hist. 
