16 
Captain Kater's account of the 
No. 1. was reduced in weight, and being then too light, 
,005 of a grain was enclosed in it and the following compa- 
risons made : 
Standard Pound 
Divisions. 
N0.1. 
Divisions. 
Error 
Divisions. 
Mean. 
Error 
in grains. 
— 0,2 
— 0,15 
— 0,35 
-0,5 
+ 0,15 
+ 0,1 
— 0,15 
— 0,35 
— 0,50 
“ 0,20 
+ 0,7° 
'0,10 
+ 0,05 q 
— 0,20 | 
— o>lS l 
+ 0,30 f 
+ °’55 
0,00 J 
-j- 0,09 
+ ,OOI 
Added ,005 of a grain to No. 3. 
Standard Pound 
Divisions . 
No. 1. 
Divisions. 
Error 
Divisions. 
Mean. 
Error 
in grains. 
— 0,4 
— 0,6 
— 0,4 
— 0,1 
-j- 0, 1 
+ 0,1 
— 0,65 
—=0,50 
— 0,40 
0,20 
+ 0,20 
+ 0,20 
— 0,25 " 
+ 0,10 
0,0 
— 0,10 
+- 0,10 
+ „ 
■ 
0,0 
,00 
| No. 3. 
I + °’ 1 
0,0 
0,0 
— 0,1 
— o,s 
0,0 
+ 0,15 
0,0 
0,0 
0,0 
— 0,2 
+ 0,2 
+ 0,05 1 
0,0 
0,0 ' 
+ 0,1 [ 
— 0,1 
+ 0,2 J 
+ 0,04 
+, 0005 
The wires which were found necessary to make each of 
the copies equal to the Standard troy pound being enclosed, 
the button was screwed in with a force sufficient to resist 
any ordinary attempt to detach it ; but should such an en- 
deavour ever be made with success and the wires be lost, 
the following table contains an account of their number and 
value. 
