22 
saloon, of the Iolite of Werner, also called dichroite 
NatThtst. fr° m i* s exhibiting two different colours when 
viewed in different positions. 
(.Case 10.) This case contains zeolitic sub- 
stances, viz. the me so type, among the specimens 
of which may be particularized those with per- 
fect prismatic acicular crj/stals (needle stone of 
Werner) ; the delicately fibrous varieties ; the red 
compact variety, by some called crocaiite, &c. — 
The natrolite of Klaproth, of which two speci- 
mens are added, is by some considered as a va- 
riety of mesotype. — Stilbite, mostly crystallized : 
among the coloured varieties is the red from 
Fassa (Fassait). — Apophyllit, some varieties of 
which have been mistaken for mesotype and stil- 
bite.— Analcime, among the crystallized varieties 
of which are remarkably large specimens of the 
trapezoidal modification. — Chabasite or chabasie, 
in groups of primitive rhombohedral and modified 
crystals. 
(Case 11.) Continuation of zeolitic substances. 
— Prehnite, crystallized and massive ; to the 
former also belongs the koupholite , to the latter, 
according to Count Bournon's observations, may 
be referred the substance known by the name of 
Chinese white jade, of which some specimens 
are added. — Harmotome, or cross stone, both in 
simple and cruciform crystals, from Oberstein, 
, Strontian, 
