158 Mr. Hatchett’s Experiments on the various Alloys , 
Table IV. ( continued .) 
Quality. 
Weight be- 
fore friction. 
Weight after 
friction. 
Loss. 
Grains. 
Grains. 
Grains. 
21. Gold with copper 
- 
139 
138,70 
0,30 
22. Gold with silver - 
- 
153»50 
152-9° 
0,60 
23. Gold with copper 
- 
138,70 
136,20 
2,50* 
24 Gold with iron and copper 
I38.5O 
137.10 
1,40 
25. Gold with copper 
- 
I42 
I42 
— 
2 6. Gold with silver and copper 
137,80 
137,80 
— 
27. Gold 23 car. 3^ grs. 
- 
140,10 
137,80 
2 , 30 + 
28. Standard silver 
- 
86,44 
84,10 
2,34 
29. Gold 23 car. 3^ grs. 
- 
139,80 
138,10 
1,70 
30. Gold with silver - 
- 
156,8° 
15540 
1 , 4 ° 
31. Gold 23 car. 3 1 grs. 
- 
140,80 
137.60 
3.20 
32. Gold with copper 
- 
141 60 
144 . 2 °t 
— 
33. Gold 23 car. grs. 
- 
- 241 
140,10 
0,90 
34. Gold and copper in 
equal 
parts 
- 
103,38 
1 03.40 § 
— 
35. Gold with silver - 
- 
154.50 
153.40 
1,10 
36. Gold of 18 carats 
- 
121,02 
121 ,80 || 
— 
37. Gold with silver 
- 
155.50 
153.40 
2,10 
38. Gold and copper in 
equal 
parts 
- 
102 
lOl ,80 
O, 20 ^[ 
39. Gold with silver 
- 
153.60 
152,10 
1,50 
40. Gold with silver and copper 
140 
137.50 
1,60 
* The gold alloyed with copper was coated by the gold alloyed with iron and 
copper. 
f The fine gold was coated by the silver. 
\ The standard gold was coated by the fine gold, and had gained 2,60. 
§ The gold alloyed with an equal proportion of copper was coated by the fine gold, 
and had gained ,02. 
|| The gold of 18 carats was coated by the gold alloyed with silver, and had gained 
0,78. 
qf The gold alloyed with an equal part of copper was coated by the gold alloyed 
with silver. 
