Primumque constituit cavum ex auro perfectum aut ex gemma terebrata; ea enim nec teruntur percussu aquae nec sordes recipiunt, ut obturentur.
First he made a hollow tube of gold, or pierced a gem; for these materials are neither worn by the passage of water nor so begrimed that they become clogged.
final_alignments\Vitruvius_Architecture_Book_9.json