His perfectis in suis locis spirae conlocentur, eaeque ad symmetriam sic perficiantur, uti crassitudo cum plintho sit columnae ex dimidia crassitudine proiecturamque, quam Graeci  vocitant, habeant sextantem; ita tum lata et longa erit columnae crassitudinis unius et dimidiae.
When this is done, let the bases be put in position, and let them be so finished in proportion that the thickness with the plinth amounts to half the thickness of the column, and have a projection (which the Greeks call ecphora) of one-sixth. The bases will be one and a half thicknesses of a column, front and side.
final_alignments\Vitruvius_Architecture_Book_3.json