"Travertine and all stone of that class can stand injury whether from a heavy load laid upon it or from the weather; e…"

"There are two styles of walls "opus reticulatum," now used by everybody and the ancient style called "opus incertum."…"

"There will still be the question why Tuscany, although it abounds in hot springs, does not furnish a powder out of wh…"

"All these soft kinds [of stone] have the advantage that they can be easily worked as soon as they have been taken fro…"

"There are also several quarries called Anician in the territory of Tarquinii, the stone being of the color of peperin…"

"Since, on account of the proximity of the stone-quarries... nearest to the city, necessity drives us to make use of t…"

"Next comes the consideration of stone quarries from which dimension stone and supplies of rubble to be used in buildi…"

"The stone in quarries is found to be of different and unlike qualities. In some it is soft... in others it is medium.…"

"While in Campania the burning of the earth makes ashes, in Tuscany the combustion of the stone makes carbuncular sand…"

"Both kinds should be constructed of the smallest stones, so that the walls, being thoroughly puddled with the mortar,…"