new standards of weights and measures . 
13 
Standard Pound 
Divisions. 
No. 2. 
Divisions. 
Error 
Divisions. 
Mean. 
Error 
in grains. 
+ °>5 
+ 1,0 
+ 1)0 
— 2,0 
- os 
— 05 
— 1 1 
— 2,5 ) 
— OS 
— .037 
No . 4. 
+ J >4 
+ 0,1 
+ 0,3 
+ 0,4 
+ 0,9 
+ 0,0 
+ 0,4 
+ 0,3 
-0,5 ' 
— 0,1 
+ 0,1 
— 0,1 „ 
—0,15 
™ = $0022 
No. 5. 
+ 0,5 
+ 0,0 
+ 0 + 
+ 0,2 
+ 0,1 
+ 0,1 
— 0,1 
+ 0,3 
+ 0,3 
— 0,3 
— 0,4 
— 0,1 / 
— 0,1 V 
— °>5 \ 
— 0,4 J 
— 0,3 
— ,0044 
- 
Wires of the following weights were now added : 
To No. 2. 
- 
,020 grains. 
3 - 
- 
,050 
4 . 
- 
,002 
5 - 
- 
,004 
The centre of gravity of the balance was raised, so that 
by frequent trials, one hundredth of a grain occasioned the 
index to vary one division. 
Standard Pound 
Divisions. 
No. 3. 
Divisions. 
Error 
Divisions. 
Mean. 
Error 
in grains. 
— 0,; 
— 0,1 
+ °>4 
— 0,6 
+ 0,3 
+ 0,9 
— 0,2 
— 0,6 
— 0,4 
> 
+ 0,1 
+ 0,1 
+ o>° 
— 0,43 
— >0043 
— 0,2 
— 2,1 
— 1,9 
— 0,5 
— 2,1 
— 1,6 J 
1 
The centre of gravity was lowered, so that one-hundredth 
of a grain was equal to eight-tenths of a division. 
