C 510 ] 
'given'the like account of the Imperial Denarius, and 
lays he found its weight from Nero to Sept. Sevcrus, 
to be to the Confular Denarius in the proportion of 
:? ^ (9)* 
Having determined the weight of the ancient 
Roman Pound from the gold coins, to be 5040 
^Troy grains, it feems requifite to fay fomeihing con- 
■cerning the heavy weights exhibited by Gruter and 
Fabretti, which are irreconcileabie to every other 
•evidence. 
Thofe with infcriptions are not older than the reign 
“of Auguflus^ but neither bis coins, nor thofe of his 
fucceffors, will by any means anfwer to fuch flandards, 
Fabretti’s mean pound of 5500 Troy grains, ex- 
ceeds Auzout’s mean Pound from the Congius by 
above three fourths of the antient Roman Ounce, 
though that velTel is greater than can be derived from 
the greateft probable meafure of the antient Roman 
foot. 
The weight of fpring-water contained in the cube 
of half that.foot (which was the legal meafure of the 
Congius) is thus determined. 
According to Eifenfchmid’s Table of fpecific gra- 
vities (i), a cubic Paris inch of fpring-water fhould 
weigh 374 Paris grains in winter, when liquors are 
heavieft. Therefore the cube of half the Paris foot 
(or 216 cubic Paris inches) muft weigh 80784 fuch 
grains. 
The greateft probable meafure of the antient Ro- 
man foot, does not exceed 974 fuch parts as the Paris 
foot contains 1065:^ (2). 
(9) Eifenfchmid, p. 33. (i) Eifenfchmid, p. 175. 
(a) See the Difcourfcon the Roman Foot, Phih Trauf.Vol.LI . 
' Aud 
