io6 Mr. Hatchett’s Experiments on the various Alloys , 
The specific gravity ef standard gold being found by the 
preceding experiments to be so extremely variable, according 
to the nature and quantity of the metals which were employed 
singly or conjointly as alloys, the following Table has been 
added, to show the comparative degrees of expansion and con- 
traction which took place, in consequence of these combinations. 
Table II. 
Bulk after 
Specific 
Specific 
Bulk before combination, 
combina- 
Contrac- 
gravity of 
Metals. 
gravity. 
Weight. 
in grains 
, of water. 
tion. 
Expansion. 
tion. 
the mass. 
Gold - 
Silver ■> 
grains. 
19,172 
10,474 
442 
38 
23,05 
3> 6 3 
J* 26,68 
26,78 
,10 
— 
17,927 
Gold - 
19,172 
442 
23,05 
1 
27,67 
*67 
Silver 
10,474 
*9 
1,81 
> 27,00 
— 
17*344 
Copper - 
8,895 
19 
2,14 
J 
Gold - 
Copper - 
19,172 
8,895 
442 
38 
23,05 
4, 2 7 
} 27,32 
27,98 
,66 
- 
17*157 
Gold - 
Iron 
19*172 
7,700 
442 
38 
23,05 
4*94 
} 2 7*99 
28,43 
*44 
16,885 
Gold - 
19,172 
442 
23,05 
l 27,66 
Iron 
7,700 
19 
2,47 
28,03 
*37 
— 
I 7 *I 2 5 
Copper - 
8,895 
J 9 
2,14 
J 
Gold - 
Tin - - 
19,172 
7,291 
442 
38 
23,05 
5,21 
| 28,26 
2 7*73 
- 
*53 
17*307 
Gold - 
19,172 
442 
23,05 
1 
Tin 
7,291 
19 
2,6 i 
\ 2 7* 80 
2 7>78 
— 
,02 
I 7* 2 78 
Copper - 
8,895 
19 
2,14 
J 
Gold - 
39,172 
442 
23,05 
1 
Copper - 
8,895 
3 ° 
3*37 
> 2 7 » 5 2 
27,66 
*14 
■ — 
17*352 
Tin 
7,291 
8 
1,10 
J 
Gold - 
Lead - 
19,172 
ii *352 
442 
38 
23,05 
3*35 
| 26,40 
26,54 
*14 
- 
18,080 
