33 PRETENDED NEW METAt J PALLADIUM. 



effefl of heat upon that fubftanoe. Hence we may conclude, 

 that there is not any a6tion between charcoal and palladium. 

 Allay. Palla- I put equal parts of palladium and gold into a crucible, for 

 gray and fcfs * ^^^ purpofc of forming an alloy. The refult, owing to an accU 

 duaiie, dent, did not weigh fo much as the fum of the quantities em- 



ployed; therefore, the proportions in this alloy were uncertain. 

 Its colour was gray ; its hardnefs about equal to that of wrought 

 iron. It yielded to the hammer; but was lefs du6lile than 

 each metal feparate, and broke by repeated percuffions. Its 

 fra6lure was coarfe-grained, and bore marks of cryftallization. 

 Its fpecific gravity was 1 1,079. 

 PaUadlum and Equal parts of platina and palladium, entered into a fuiion at 

 platinaj denfer, ^ ^^^^ ^^^ much fuperior to that which was capable of fufmr 

 Ids malleable. ,, ,. , / , ,t , r ,• „ r ,, . 



palladium alone. In colour and hardnels, this alloy relembied 



the former; but it was rather lefs malleable. Its fpecific gravity, 



I found to be 15, Ul. 

 Palladium and Palladium, alloyed with an equal weigKt of filver, gave a 

 divert whiter, button of the fame colour as the preceding alloys. This was 



harder than filver, but not fo hard as wrought iron ; and its 



polilhed iurface was fomewhat like plafina, but whiter. Its 



fpecific gravity was 11, 290, 

 ITalladlum and The alloy of equal parts of palladium and copper was a 

 copper: harder jjj^^jg more yellow than any of the preceeding alloys, and broke 



more eafily. It was liarder than wrought iron ; and, by the 



file, aflumed rather a leaden colour. Specific gravity 10,392, 

 Palladium and Lead increafes the fufibility of palladium. An alloy of 

 kadt more fufi-^l^gjpg metals, but* in unknown proportions, was of a gray 

 grained, and colour, and its fra6lure was finegrained. It was fuperior to 

 hard and brittle, qW the former in hardnef>>, but was extremely brittle. I foun(i 



its fpecific gravity to be 1 2,000. 



Palladium and Equal parts of palladium and tin gave a grayifh button, in- 



tm : grayiih, fgrior in hardnefs to wrought iron, and extremely brittle. Its 

 brittle, compaa, ^ ^ 



fra6ture was comparand fine-grained. Specific gravity 8,175, 



Palladium and With an equal weight of bifmuth, palladium gave. a button 



bifmuth ; gray, ^jjj brittle, and nearly as hard as fteel. Its colour was 



very hard and ^ 



brittle. gray; but^when reduced to powder, it was much darker. 



Its fpecific gravity, I found to be 1 2,587. 

 Palladium and Iron, when alloyed with palladium, tends much to dim inilhi 

 iron. Palladium its fpecific gravity, and renders it brittle. Arfenic increafes 



the fufibility of palladium, and renders it extremely brittle, 



JFron^ 



