LXX 
PHILOSOPHICAL SOCIETY OF WASHINGTON. 
NOTE B. 
By direction of the Parliamentary Committee of 1758, and in 
the presence both of that body and of Mr. Farley, deputy chamber- 
lain, Messrs. Harris and Gregory of the London Mint compared 
the several standard troy weights of the Exchequer, with the fol¬ 
lowing results: 
4-oz. 
8-oz. 
16-oz, 
32-oz. 
64-oz. 
128-oz. 
256-oz. 
weight = All smaller weights — 4 grain. 
“ 4- 4 “ 
“ = « + 4 
“ — “ -f 2 grains, 
“ — +3 “ 
- = a _j_ a 
a ^ « __ 21 
The weighings which yielded these results were made at the Lon¬ 
don Mint; the instruments employed being “ a very curious and 
exact pair of scales, belonging to Mr. Harris, and the scales used 
at the Mint for the weighing of gold.” After recording the results 
in their report,^ the Committee continued as follows: 
“ Therefore beginning the difference from the sixteen-ounce weight, and 
carrying it on to the greatest troy weight in the Exchequer, the total differ¬ 
ence v/ill he eight grains and one-half.” 
“ The fourth part of which is two grains upon sixteen ounces, which is a 
grain and a half upon the twelve ounces or pound tro}?-.” 
“ Then the eight and four ounces troy of the Exchequer were compared 
with the following weights : ” 
“ Firsts with the pound troy used at the Mint in weighing of gold, which 
was heavier than that at the Exchequer one grain.” 
Secondly^ with the eight and four ounces at the Mint of the 6th of 
Queen Anne, 1707, which was heavier than that at the Exchequer half a 
grain.” 
“ The eight and four ounces of Queen Elizabeth 1588 at the Mint, was 
heavier than that at the Exchequer three quarters of a grain; another of 
the same year of Queen Elizabeth at the Mint, stampt with a tower, a 
thistle and crown, and EL and crown, was heavier than that at the Ex¬ 
chequer one grain.” 
HI, p. 437. 
