31 
them with regard to their chemical composition • saloon. 
such as the agalmatolite of Klaproth (Bildstein of Na ~h u;t . 
Werner, talc glaphique of Haiiy) employed by 
the Chinese for carving images, vessels, Sec. — • 
The keffekil or meerschaum, from Natolia, of 
which pipe bowls are made ; and a related sub- 
stance, called keflfekilite, by Dr. Fischer, who dis- 
covered it in the Crimea.— Lithomarge, the more 
remarkable varieties of which are, that of a reddish 
yellow colour, from Rochlitz, in porphyry ; the 
line purplish blue variety from Planitz, called 
terra miraculosa Saxonka by old writers.— Ful- 
lers earth. — Bole; green earth, &c. 
{Case 10.) In this, and the four following 
glass-cases are deposited the various carbonates of 
lime.- — Crystallized carbonate of lime or calca- 
reous spar; specimens illustrative of the cleavage, 
supernumerary joints, colour, &c. ; primitive 
rhombohedron (rhomboid) ; the various secon- 
dary, rhomboheclrons (all of which, together with 
the modifications in the next cases, are deter- 
mined after Haiiy and Bournon : among these 
the most common, but not the least striking, is 
the inverse rhombohedron, so called from being 
as it were an inversion of the primitive.;, the same 
with a considerable admixture of quartz, com- 
monly called crystallized sandstone of Fontaine- 
bleau, &c. &c. 
{Case 20.) 
