SUBJECT INDEX. 



1. HISTOEY. 



1806: 3 Fourcroy and Vauquelin 

 1850: 5 Thomson 



Platinum. 

 1814: 1 Vauquelin 

 1845: 2 Schweigger 

 1860: 18 Delarue 



Platinum in Eussia. 

 1827: 1 Mamyscheff 

 1880: 1 Koppen 



Ehodium as iron. 



1841: 6 Tilley 

 Platinum known to the ancients. 



1790: 1 Cortenovis 



1845: 1 Schubarth 



1850: 1 Paravey 



2. DISCOVEEY (see also New Met- 



als, 3). 



1804: 12 Tennant 

 1805: 9 Gilbert 

 1805: 10 [Gilbert] 

 1805: 11 [Gehlen] 

 Osmium. 



1804: 12 Tennant 

 1805: 9 Gilbert 

 1805: 10 [Gilbert] 

 1805: 11 [Gehlen] 



Ruthenium. 



1844: 4 Claus 

 1844: 5 Claus 



Platinum as alloy of gold and iron» 

 1774: 1 BufEon 

 1774: 2 Blondeau 

 1784: 3 Buflon 

 1784: 4 Milly 

 1786: 3 Morveau 



Palladium as platinum amalgam^ 

 1803: 1 Chenivix 

 1808: 1 Collet-Descotils 

 1808: 2 Berthollet 



. NEW METALS in platinum ore. 



Iridium. 

 1803: 9 Fourcroy and Vauquelin 

 1803: 10 Collet-Descotils 

 1804: 8 Fourcroy and Vauquelin 



