The Nuremburg or Venetian pound. Its ounce, = 460 grains, was 12 drachms of 57·6 grains, 1/100 of the lesser rotl.
The Cologne pound of 7200 grains, its ounce = 451 grains, or at Tower standard 450 grains, was the greater rotl. Or its ounce was 9 dirhems of that rotl, dirhems of 50·03 grains.
It is thus seen that every European pound is composed of ounces on a dirhem-basis, of 8, 9, 10 or 12 dirhems; or, as in the case of the averdepois ounce, coinciding with the ounce of 6 mithkals or 9 dirhems. The ounce was—
8 dirhems in the light Mediterranean pounds.
9 dirhems in the medium pounds of Spain and Cologne.
10 dirhems in the Troy pounds.
10 greater dirhems in the Russian pound.
12 drachmæ in the Venetian pound.
Original Weights of the Dirhems
| 1. | Coin-weights:— | Grains. | ||||||
| Aureus, | 1/6 | of | As-ounce | 70·1 | ||||
| 3/4 | „ | 1/8 | „ | „ | greater dirhem | 52·6 | ||
| Mithkal, | 1/6 | of | Egypto-Roman ounce | 72·74 | ||||
| 3/4 | „ | 1/9 | „ | „ | „ | lesser dirhem | 48·5 | |
| 2. | Rotl-weights:— | |||||||
| 1/100 lesser rotl | drachma | 57·63 | ||||||
| 1/144 greater rotl | medium dirhem | 50·03 | ||||||