2 3 
new standards of weights and measures. 
The avoirdupois pounds were distinguished from each 
other by the following marks. 
That which I shall call 
No 
No. 2 
call f i P D 
. l. \ 18 
•{ 
Av s 
824 
1 P D Av s 
1824 • 
a dot after the figures. 
( 1 P“ A V s . a dot under the letter S, and another 
^ 1824* dot after the figures. 
No. 4. | 1 P 
No. 5. 
1 P“ Av s a dot under the letter D, another dot 
under the letter S, and a third dot 
824* after the figures. 
These weights were successively compared with the avoir- 
dupois pound No. 1. which was taken both before and after the 
others ; for this purpose Mr. Robinson’s balance was used. 
One hundredth of a grain occasioned a variation of 0,7 of 
a division. 
Avoirdupois Pounds. 
No. 1. 
Divisions. 
No. 2. 
Divisions. 
No. 3. 
Divisions. 
No. 4. 
Divisions. 
No. 5. 
Divisions. 
No. 1. 
Divisions. 
+ 0,2 
— 0,4 
— 0,4 
— 0,8 
— 0,9 
+ 0,3 
— 0,4 
— 0,4 
— 0,4 
— °>7 
— 0,8 
— 0,2 
— 0,4 
°>3 
— 0,4 
°>7 
— 0,8 
— 0,5 
— 0,5 
— 0,4 
— 0,3 
~ o ,7 
-°>7 
— 0,2 
— 0,28 
— 0,15 
— 0,21 
— o ,37 
Mean. 
— o ,37 
— 0,72 
— 0,8 
— 0,15 
Means. 
By the above comparisons the difference of each weight 
from No. 1. is as follows; 
