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 : 
4-02. weight = All smaller weights — + grain. 
sO zs cA ye tess +3 * 
Le-oz.,  & == ' aed gt 
82-02. f= i + 2 grains. 
64025, ‘=m a +3 « 
128-02. “ = rf +14 * 
256-02. “ = ‘ —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, ond 
corrying it on to the greatest troy weight in the Exchequer, the total differ- 
ence will be 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 troy.” 
‘Then the eight and four ounces troy of the Exchequer were compared. 
with the following weights: ”’ 
“ First, 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.” 
+ ALY, p..437. 
