specific Gravity, and comparative JVear of Gold. 107 
Table II. ( continued .) 
Metals 
Specific 
gravity. 
Weight. 
Bulk before combination, 
in grains of water. 
Bulk after 
combina- 
tion. 
Expansion. 
Contrac- 
tion. 
Specific 
gravity of 
the mass. 
Gold - 
Lead - 
Copper - 
19.172 
11,352 
8,895 
grains. 
442 
19 
19 
23,05 
1,67 
2,14 J 
. 26,86 
27,02 
,16 
— 
17,765 
Gold •• 
Copper - 
Lead - 
19,172 
8,895 
11,352 
442 
30 
8 
23,05 
3,37 
, 7 ° J 
■ 27,12 
27,73 
,6l 
- 
17,312 
Gold - 
Copper - 
Lead - 
19.172 
8,895 
11,352 
442 
34 
4 
23,05 
3,82 
,35 J 
> 27,22 
28,18 
,96 
— 
17,032 
Gold - 
Copper - 
Lead - 
19,172 
8,895 
11,352 
442 
37,50 
0,50 
23,05 1 
4,22 
,04 J 
27,31 
28,87 
1,56 
— 
16,627 
Gold - 
Copper - 
Lead 
19,172 
8,895 
11,352 
442 
37,75 
0,25 
23,05 1 
4,24 
,02 J 
> 27,31 
28,17 
0,86 
— 
17,039 
Gold - 
Bismuth 
19,172 
9,822 
442 
38 
23,05 
3,87 J 
j> 26,92 
26,61 
- 
,31 
18,038 
Gold - 
Copper - 
Bismuth 
19,172 
8,895 
9,822 
442 
3 ° 
8 
23,05 
3,37 
,82 
| 27,24 
27,74 
,50 
- 
17,302 
Gold - 
Copper - 
Bismuth - 
19,172 
8,895 
9,822 
442 
34 
4 
23,05 
3,82 
, 4 i . 
J- 27,28 
28,49 
1,21 
- 
16,846 
Gold - 
Copper - 
Bismuth - 
19,172 
8,895 
9,822 
442 
37 , 5 ° 
0,50 
23,05 ] 
4,22 
,05 J 
\ 27,32 
28,61 
1,29 
- 
16,780 
Gold - 
Copper - 
Bismuth - 
19,172 
8,895 
9,822 
442 
37,75 
0,25 
23,05 ] 
4,24 
,°3 J 
> 27,32 
28,07 
,75 
- 
17,095 
Gold - 
Zinc 
19,172 
7,065 
442 
38 
2 17 } 
28,34 
- 
,09 
16,937 
Gold - 
Zinc 
Copper - 
19,172 
7,065 
8,895 
442 
19 
19 
23,05 
2,69 
2,14 . 
j- 27,88 
27,95 
,07 
— 
17,175 
