20 
SALOON, found in the sands of the Senner heath, in the 
Nat. Hist, county of Lippe (where, from their supposed origin, 
they are called lightning tubes), and subsequently, 
under similar circumstances, at Drigg, on the coast 
of Cumberland, which is the locality of the speci¬ 
men here deposited. [See also British Coll.]—The 
hyalite is placed here, as a mineral related both to 
stalagmitical quartz and calcedony.—^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 remark¬ 
able are the smalt-blue variety from Felsobanyain 
Transylvania, crystallized in cubes; the branched 
and stalactical calcedony from Iceland, &c.; the 
botryoidal from Ferroe; nodules including water 
(enhydrites) from Monte Berico, near Vicenza, 
where they are said to occur in volcanic rocks; cut 
and polished pieces of calcedony, with black and red 
dendritic and other figures, vulgarly called mocha 
stones; varieties with white, brown, and black, 
straight or curved lines: onyx, sardonyx, &c. 
{Case 7.) Calcedonic substances continued. 
Among these are various specimens of the red and 
yellowish varieties of calcedony, called carnelian: 
striped carnelians, &c.— Heliotrope^ an intimate 
mixture of calcedony and green earth, which, when 
containing disseminated particles of red jasper, is 
commonly termed blood-stone.—^The beautiful and 
much esteemed variety of calcedony. called chryso- 
prase: 
