Sunt enim aliae molles, uti sunt circa urbem Rubrae, Pallenses, Fidenates, Albanae; aliae temperatae, uti Tiburtinae, Amiterninae, Soractinae et quae sunt his generibus; nonnullae durae, uti siliceae.
For some are soft, as they are in the neighbourhood of the city at Grotta Rossa, Palla, Fidenae and Alba; others are medium, as at Tivoli, Amiternum, Soracte, and those which are of these kinds; some hard, like lava.
final_alignments\Vitruvius_Architecture_Book_2.json