154 . Mf. Hatchett's Experiments on the various Alloys , 
Table III. 
Number of revolutions, 22904,0. 
Quality. 
Weight be- 
fore friction. 
Weight after 
friction. 
Loss. 
1. Gold 23 car. 3^ grs. - 
2. Gold 23 car. 3-^ grs. 
Grains. 
142,50 
140,5° 
Grains. 
139.50 
137,20 
Grains. 
3,0 
3,30 
3. Gold alloyed with silver - 
4. Gold alloyed with silver - 
153,60 
158,90 
153.60 
158,80 
0,10 
5 Gold with silver and copper 
6 . Gold with silver and copper 
137.4° 
1 36', 80 
131 
123,50 
6,40 
3,30* 
7. Gold with copper - 
8. Gold with copper 
1354° 
135.30 
135.30 
0,10 
9. Gold with iron and copper 
10. Gold with iron and copper 
134 
133,80 
1 lb’, 80 
1 19,80 
17,20 
14,0 
11. Standard silver 
12. Standard silver - 
84.50 
84.50 
00 00 
•f* *£* 
0 0 
0,10 
0,10 
13. Copper - 
14. Copper 
84,70 
82,30 
34.00 
43,60 
50,10 
38,70 
15. Standard silver 
16. Copper - 
82,90 
82,40 
6‘8 
46', 60 
14,90 
35,80 
17. Gold made standard by 
copper - 
18. Copper 
117,10 
66,86 
83,40 
23,50 
33,70 
43,30 
19. Gold with copper 
20. Standard silver 
13440 
83,30 
129,20 
75.10 
5, 20 
8,20 
21. Gold with copper 
22. Gold with silver 
138,70 
152,90 
1 38,60 
152,80 
0, 10 
0,10 
23. Gold with copper 
24. Gold with iron and copper 
130,20 
137,10 
132,90 
130 
3,30 
7,10 
* These two pieces slipped out of the sockets of the machine, and were so much 
injured, that it would be improper to consider the loss mentioned in the Table as that 
which they would have suffered by regular friction. 
