17 
new standards of weights and measures. 
No. 1 . contains 1 wire = ,005 gr. 
2. . . 1 wire = ,020 gr. 
3- • • 3 wires = ,050 + ,005 + ,005 gr. 
4. . . 2 wires = ,002 + ,002 gr. 
5. . .2 wires = ,004 + ,002 gr. 
In order to employ the whole of the preceding comparisons 
in deducing a final result, it will be necessary to add to each 
error given in the Tables the sum of the weights which were 
enclosed after the determination of such error. 
Troy Pound No. 1. 
The mean of six comparisons gave for the 
error of No. 1. - - - +>001 
The mean of six other comparisons - - ,000 
Troy Pound No. 2. 
The mean of three comparisons gave for 
the error of No. 2. — ,037 + ,02 = — ,0170 
The mean of six other comparisons - -f- ,0029 
of six other comparisons - + 
Troy Pound No. 3. 
The mean of six comparisons gave 
— ,0043 + >°°5 + >°°5 = - - + >°°57 
The mean of four other comparisons 
gave — ,0065 + ,005 + ,005 = - 4. ,0035 
The mean of four other comparisons 
gave — ,0074 + ,005 = - 
The mean of six other comparisons - - 
D 
MDCCCXXVI. 
— ,0024 
-j- ,0005 
