I will now speak of the weights, of which I have frequently made mention. Among mining people these are of two kinds, that is, the greater weights and the lesser weights. The centumpondium is the first and largest weight, and of course consists of one hundred librae, and for that reason is called a hundred weight.
The various weights are:—
| 1st | = | 100 | librae | = | centumpondium. |
| 2nd | = | 50 | " | ||
| 3rd | = | 25 | " | ||
| 4th | = | 16 | " | ||
| 5th | = | 8 | " | ||
| 6th | = | 4 | " | ||
| 7th | = | 2 | " | ||
| 8th | = | 1 | libra. |
This libra consists of sixteen unciae, and the half part of the libra is the selibra, which our people call a mark, and consists of eight unciae, or, as they divide it, of sixteen semunciae:—
| 9th | = | 8 | unciae. |
| 10th | = | 8 | semunciae. |
| 11th | = | 4 | " |
| 12th | = | 2 | " |
| 13th | = | 1 | semuncia. |
| 14th | = | 1 | sicilicus. |
| 15th | = | 1 | drachma. |
| 16th | = | 1 | dimidi-drachma. |
| The | 1st | is called | 1 | centumpondium. |
| " | 2nd | " | 50 | librae. |
| " | 3rd | " | 25 | " |
| " | 4th | " | 16 | " |
| " | 5th | " | 8 | " |
| " | 6th | " | 4 | " |
| " | 7th | " | 2 | " |
| " | 8th | " | 1 | " |
| " | 9th | " | 1 | selibra. |
| " | 10th | " | 8 | semunciae. |
| " | 11th | " | 4 | " |
| " | 12th | " | 2 | " |
| " | 13th | " | 1 | " |
| " | 14th | " | 1 | sicilicus. |
The fourteenth is the last, for the proportionate weights which correspond with a drachma and half a drachma are not used. On all these weights of the lesser scale, are written the numbers of librae and of semunciae. Some copper assayers divide both the lesser and greater scale weights into divisions of a different scale. Their largest weight of the greater scale weighs one hundred and twelve librae, which is the first unit of measurement.
| 1st | = | 112 | librae. |
| 2nd | = | 64 | " |
| 3rd | = | 32 | " |
| 4th | = | 16 | " |
| 5th | = | 8 | " |
| 6th | = | 4 | " |
| 7th | = | 2 | " |
| 8th | = | 1 | " |
| 9th | = | 1 | selibra or sixteen semunciae. |
| 10th | = | 8 | semunciae. |
| 11th | = | 4 | " |
| 12th | = | 2 | " |
| 13th | = | 1 | " |