50 
SALOON. Jn case are also placed the ores of colum- 
Nat. Hist, bium or tantalum, of yttria and of cerium, &c.— ^ 
Columbite :—the specimen from North America in j 
which Mr. Hatchett discovered the metal(see Phil. , 
Trans. 1802); yttriferous columbite ox y tiro tan- . 
talite^ from Bavaria, &c.—Silicate of yttrium: ga- !■ 
doUnite, of which a unique crystal is here deposit- j, 
ed \pyrorthite and orthite^ two scarce Swedish mi- 
nerals, related to gadolinite .—Cerite or cerine 
(silicate of cerium) from Bastnaes in Sweden.— 
Yttrocerite, a fluate of lime, yttria and cerium ; a 
and a related mineral composed of fluate of yttria ^ 
and oxide of cerium, with only a small portion of | 
lime, but in wdiich is often found a fluate of the i 
new earth to which Berzelius has given the name e 
of thoria .—Specimens of the oxide of chromium^ I 
in quartz, discovered by M. Leschevin at Creu- i 
zot, in the department of the Saone and Loire. X 
In the opposite compartment of this table-case 
are deposited (as appendix to the ores of iron) the :i 
substances called aerolithes^ because they have 
fallen from the atmosphere, and meteoric stoiies^ ,'l^ 
because they are by some supposed to be deposit- (i^ 
ed from meteors. The specimens oflthe former are 
—native iron from Gross-kamsdorf in Saxony;— l-£ 
two small polished pieces of the mass found in i 1 
Southern Africa, wdflch weighed about 250 IjlJf 
pounds, and is now^ in the cabinet of Haarlem;— j p: 
fragment of the iron from Senegal;—specimens j|lii 
