20 
SALOON. 
Kat. Hist. 
found in the sand^s. of the Senner heath, in the 
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 caicedony.—The rest of 
this table-case, and the greater part of the following, 
are occupied by calcedonic substances. Among the 
specimens of common caicedony^ the most remark¬ 
able are the smalt-blue variety from Felsobanya in 
Transylvania, crystallized in cubes; the branched 
and stalactical caicedony 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 caicedony, with black and red 
dendritic and other figures, vulgarly called mocha 
stones ; varieties with white, brown, and black, 
straight or curved lines : on}rx;, sardonyx, &c. 
{Case 7•) Calcedonic substances continued. 
Among these are various specimens of the red and 
yellowdsh varieties of caicedony, called carnelian: 
striped carnelians, &c.— Heliotrope^ an intimate 
mixture of caicedony and green earth, wdiich, wdien 
containing disseminated particles of red jasper, is 
commonly termed blood-stone.—The beautiful and 
much esteemed variety of caicedony, called chryso- 
prase: 
