i*j6 Mr. Hatchett’s Experiments on the various Alloys , 
Table IX. (continued.) 
Quality. 
Weight be- 
fore friction. 
Weight after 
friction. 
Loss. 
Grains. 
Grains. 
Grains. 
Gold made standard by silver 
and copper, unstamped - 
282,70 
271,10 
ll,6o 
Gold made standard by silver 
and copper, stamped 
282,20 
267,20 
1 5 
Gold made standard by fine 
copper, unstamped 
243.7° 
228,20 
15,5° 
Gold made standard by fine 
copper, stamped 
243,60 
i 229,70 
13,9° 
Gold made standard by equal 
parts of fine and dollar cop- 
per, unstamped 
249,70 
237,80 
11,90 
Gold made standard by equal 
parts of fine and dollar cop- 
per, stamped 
249,60 
234,80 
M 
00 
0 
Gold of 18 carats, unstamped 
208,30 
199.3° 
9 
Gold of 18 carats, stamped - 
2 09 
197, 10 
11,9° 
Standard silver, unstamped - 
1 44,60 
134,80 j 
9.80 
Standard silver, stamped 
144,80 
134,4° 1 
10,40 
Fine copper, unstamped 
151,6b | 
144,4° ! 
7,20 
Fine copper, stamped - - | 
163,80 j 
154,20 | 
9,60 
It appears unnecessary to make any observations upon this 
experiment, as the results of it so nearly correspond with those 
of the former, in which whiting was employed. 
Experiment in. 
Two pieces of each kind of gold, &c. were fixed as before ; 
and the horizontal table was covered with filings of gold made 
standard by copper. The filings were fixed with a solution of 
