25 
Maenesia, rendered impure by Copper and Iron. (Gilb. Ann., 
LXV. and LXVL) 
Apyr, Brugnatelli, 1821. (Gilb. Ann., LX VIT.) 
PLURANIUM, PoLiniumM and RUTHENIUM, all three discov- 
ered by Osann, (1828), in Platinum ores from the Ural Mts. 
(Pogg. Ann., XIIT. and XIV.) 
DonIvuM, cence in 1836, by Richardson, in a mineral 
from Aberdeen, but its identity with Glucinum was afterwards 
established by Heddle. (Ann. Chem. Pharm., XIX. and 
XXL) 
TREENIUM, discovered by Boase, in 1886, and_ partly 
supposed identical with Donium. (Thomson’s Records Gen, 
per, LV. 20.) 
TreRBIUM, found accompanying Erbium in Gadolinite, by 
Mosander (1848), but pronounced by Berlin (1860), to have 
no existence. (Ann. Chem. Pharm, LXVITI. CXXXI 
CXXXVII, &e. 
PELOPIUM, discovered by Rose, in 1846, and supposed to 
accompany Niobium (Columbium). Rose has shown that. 
Pelopic acid is convertible into Niobic acid, and this into 
Hyponiobic acid. (Pogg, Ann.; LXTX. and XC.) 
ILMENIUM, discovered in 1846, by Hermann. (Journ. pr. 
Ch., XX XVIII. and XL. also Poge. Ann., LX XTIT. 
ARIDIUM, discovered in 1850, by Ullgren. Journ. pr. 
Ch., LIL Ann: Ch. Pharm., LX XVI. and LXXXVIIL) 
Donarium, discovered in 1851, by Bergemann. (Ann. Ch. 
Pharm., LX XX. and LXXXIV.) 
THALIUM, discovered in 1852, by Owen. (Am. J. Sci., (2) 
XT. XVI. and XVIL) 
NAMELESS METAL of Platinum group, discovered by Genth, 
Pe tiglisa swe CAM.. J... Sct3(2); XV.) 
DIANUM, extracted from Tantalite from Finland, by von 
Kobell, (1860). H. Rose questioned its identity, also St. 
Claire-Deville and Herrmann. Von Kobell distinguished it 
from Niobic and Tantalic acids, by the formation of a deep 
blue solution, when treated with Tin and Hydrochloric acid. 
(Ann. Ch. Pharm., CXIV. and CXXXV1.) 
