I

Tables of Ancient Coins ,

6 n ^ k. IX.

6/ Measures of Capacity .j? o As ^ isr.

T HE 'Romans have given the proportions of their Measuresof Length, Measures of Capacity, and Weights, so exactly,that one being given it is easy to determine the other two.Thus from the Res being known, the Congius is determin’d, be-cause the Amphora, which contain’d 8 Congii, was the Cube of aPes or Foot. The Congius it self the Cube of half a Foot. Sothat it is plain the quantity of the Amphora or Congius being given,that of the Root or Side must be so likewise. The weight ofRain-water contain d in a Congius was i o Roman pounds, and thatof the Amphora 8 o : so that from the Measure of the Congius orAmphora } the quantity of their Pound, Ounce or Denarius is like-wise known. But it happens from the want of accuratenefs inexperiments, or perhaps even in the first original framer of thesemodels, that in comparing the Measures of Lengths and Capacityand Weights together, and affirming one as the Standard, the otherswill come out with some small difference.

The Pes already settled is equal to 11,604 Inches, its Cube15 6z,511 z gives the content of the Amphora in solid Inches-, anddivided by 8 gives 15.9,31 32 Inches for that of the Congius.

According to die Experiment of Villalpandus , the Congius o f Vespajianweighs in water 5 2.560 Grains Troy. In order to reduce this to solidInches, it’s known by experiment that a Cubical Englijh Foot ofRain-water weighs exactly 76 pounds Troy: or reducing the footto Inches, and the Pound to Grains, 172.8 solid Inches weigh

76