Palladii 
294 Mr. Chenevix’s Enquiries concerning the Nature 
former in hardness, but was extremely brittle. I found its 
specific gravity to be 12,000. 
Equal parts of palladium and tin gave a grayish button, in- 
ferior in hardness to wrought iron, and extremely brittle. Its 
fracture was compact and fine-grained. Specific gravity 8,175. 
With an equal weight of bismuth, palladium gave a button 
still more brittle, and nearly as hard as steel. Its colour was 
gray ; but, when reduced to powder, it was much darker. Its 
specific gravity, I found to be 12,587. 
Iron, when alloyed with palladium, tends much to diminish 
its specific gravity, and renders it brittle. Arsenic increases the 
fusibility of palladium, and renders it extremely brittle. 
From these experiments, we may form the following Table, 
shewing the difference between the true and the calculated 
mean of specific gravity in the alloys of palladium. 
Metals. 
Proportion. 
Specific gra- 
vity by cal- 
culation.* 
Specific gra- 
vity by ex- 
periment. 
Difference, 
r Gold - | 
1 
uncertain. 
uncertain. 
11 >079 
uncertain. 
Platina - 
| equal parts. 
17> 2 4 1 
15.141 
— 2,100 
Silver - 
[_ equal parts. 
1 0,996 
11,290 
+ ,294 
Copper - 
| equal parts. 
10,176 
10,392 
-f- ,216 
Lead - | 
equal parts. 
uncertain. 
12,000 
uncertain. 
Tin - 
equal parts. 
9,34° 
8,175 
— 1,165 
Bismuth j 
equal parts. 
1 0,652 
12,587 
+ 1,935 
* In the specific gravities -of the different metals, I have followed the Table given in 
«ur best elementary work, Dr. Thomson’s System of Chemistry. 
