De adiectione, quae adicitur in mediis columnis, quae apud Graecos entasis appellatur, in extremo libro erit formata ratio eius, quemadmodum mollis et conveniens efficiatur, subscripta.
As to the swelling which is made in the middle of the columns (this among the Greeks is called entasis), an illustrated formula will be furnished at the end of the book to show how the entasis may be done in a graceful and appropriate manner.
final_alignments\Vitruvius_Architecture_Book_3.json