new standards of weights and measures. 
*6 
Deductions from the preceding comparisons. 
The mean of the differences of the two 6 lb. weights from 
the six troy pounds is - - - — ,0020 grs. 
But the sum of the errors of the six troy 
pounds is ----- + ,0039 
Therefore the mean of the errors of the 
two 6 lb. weights is - - -J- ,0019 
The first comparisons of the five avoirdupois pounds with 
one of the 6 lb. weights -f- 440 grains gave for the 
difference ------- ,0630 grs. 
With the other 6 lb. weight 440 grains, 
the difference was - - - + ,0260 
The mean is - - —,0185 
But the mean error of the two 6 lb. weights is -J-,0019 
Therefore the sum of the errors of the five 
avoirdupois pounds is - - - — ,0166 
The sum of the differences between No. 1. and the other 
avoirdupois pounds being ,019 grains, and all in defect, wires 
of the following values were enclosed in each weight ; viz. 
In No. 2. 
,002 grs. 
3 . 
,002 
4 . 
,006 
5 . 
- ,007 
Total 
,017 
MDCCCXXVI. 
E 
