23 
all cases of volcanic origin. Near these substances saloon. 
are placed some specimens of the w/ite of Werner, 
also called dichroite from its exhibiting two different 
colours w’hen viewed in different positions. 
{Case 10.) This case contains zeoli tic substances, 
viz. several varieties of scolicite and of mesotype, 
among the specimens of which maybe particularized, 
those with perfect prismatic acicular crystals {needle^ 
stone of Werner) ; the delicately fibrous varieties; 
the red compact variety, by some called crocalite, 
&c.—Tlie natrolite of Klaproth, of which a few 
specimens are added, is by some considered as a 
variety of mesotype.— Stilhite^ mostly crystallized: 
among' the coloured varieties is the red from Fassa 
(Fassait).— Apophyllite^ some varieties of which 
have been mistaken for mesotype and stilbite.— 
Analcinie^ among the crystallized varieties of whidi 
are remarkably large specimens of the trapezoidal 
modification.— Chabasite or chabasie, ingroups of 
primitive rhombohedral and modified crystals. 
{Case 11.) Continuation of zeolitic substances: \ 
— Prelinite, crystallized and massive, the grass- 
green variety of which, discovered in South Africa 
by the Abb6 Rochon, has been mistaken for chry¬ 
solite, chrysoprase, and even emerald. To this be¬ 
longs also the koupholite; and the substance known 
by the name of Chinese jade, of which some speci¬ 
mens are added, may likewise be referred to Prehnite. 
—Harmotomey or cross stone, both in simple and 
cruciform 
