RARE METALS AND THEIR DISTRIBUTION. 
85 
Table 1. 
Rare metals, with dates of discovery and name of 
discoverer. 
Group. 
Metal. 
Date. 
A 
Lithium 
1817 
Rubidium 
1861 
Caesium 
i860 
B 
Radium 
1899 
C 
Beryllium 
17 97 
Cadmium 
1817 
D 
Gallium 
1875 
Indium 
1863 
Thallium 
l86l 
E 
Y ttrium 
1794 
Scandium 
1879 
Samarium 
1879 
Europium 
1901 
Gadolinium 
1886 
Terbium 
1843 
Dysprosium 
1886 
Erbium 
1843 
Thulium 
1880 
Ytterbium 
1878 
Lutecium 
1907 
F 
Cerium 
1803 
Lanthanum 
1839 
Neodymium 
1841 
(1885 
Praseodymium 
1885 
G 
Zirconium 
1788 
Thorium 
1828 
Germanium 
1886 
H 
Vanadium 
l8oi 
Niobium 
1801 
Tantalum 
1802 
I 
Molybdenum 
1778 
Uranium 
1789 
J 
Ruthenium 
1844 
Rhodium 
1804 
Palladium 
1803 
Osmium 
1803 
Iridium 
1803 
Platinum 
?i558 
1750 
Name. 
Arfvedson 
Bunsen and Kirchhoff 
Bunsen and Kirchhoff 
Prof, and Mme. Curie 
Vauquelin 
Stromeyer 
de Boisbaudran 
Reich and Richter 
Crookes 
Gadolin 
Nilsen 
de Boisbaudran 
Demarcay 
Marignac and de Bois- 
baudran 
Mosander 
de Boisbaudran 
Mosander 
Cleve 
Marignac 
Urbain : Welsbach 
Klaproth : Berzelius and 
Hisinger 
Mosander 
Mosander 
Welsbach) 
Welsbach 
Klaproth 
Berzelius 
Winkler 
del Rio 
Hatchett 
Ekeberg 
Scheele 
Klaproth 
Claus 
Wollaston 
Wollaston 
Tennant 
Tennant 
Scaliger 
Brownrigg 
