26 o

BOOK VII.

The other method of making needles is as follows :—

Copper.

The

Semunciae Sicilici.

Silver,

Semunciae Sicilici

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31st of pure silver.

So much for this. Perhaps I have used more words than those mosthighly skilled in the art may require, but it is necessary for the understandingof these matters.

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 andthe lesser weights. The centumpondium is the first and largest weight, and of