E 63 3 
qiier 2 Setts of Weights, kept there as Standards; 
one called Troy , the other Avoir depots Weight. 
As there is no Account handed down to us by our 
Anceftors, (hewing at what time, and upon what 
Occafton, thefc Weights, differing conftderably in 
Gravity from each other, were there firft depofited, 
we are at a Lofs to determine which is the ancient 
Standard Weight deferibed by the Laws of AJJife. 
The Ad in the 12th of Hen. VII. has called the 
Standard W eight by the Name of Troy Weight ; this 
is the firft time the W eights are fo called in any of 
our AJJife Laws; and notwithftanding this Authority, 
it will be found very difficult, if not impoffible, to 
reconcile the Troy IV eight and Meafure raifed there- 
from with the Words of the AJftfe , and any Meafurcs 
now in being; for the natural and mod ready Way 
to determine this Queftion is to compare both the 
Troy and Avoir depois Weight with Meafures raifed 
from each, according to the Rule laid down in the 
Ajffe y and with fuch Meafures as are or have been 
ufed by Authority. 
4 The mod exad (x) and geometrical Way of ex- 
s preffing the Capacity of any Veflel or Meafure is 
c by expreffing in known Terms the Solidity of a 
c Body which will precifely fill it : The fitted will 
‘ be Water. The Solidity of all Bodies is beft ex- 
‘ prefied by the Help of a Cube, whofe equal Sides 
‘ we 
(1) Bifhop Cumberland's Eflay, p. Co. — who alfo fays, The 
Egyptians made their Ardob the Cube of their known Standard the 
Cubit : — And that the Romans made their §>uadrantal the Cube of 
their Standard the Foot , 
