Cum ea exstructa fuerint et fastigia sua exstructionem habuerint, ita fricentur, uti, si sectilia sint, nulli gradus in scutulis aut trigonis aut quadratis seu favis extent, sed coagmentorum conpositio planam habeat inter se derectionem, si tesseris structum erit, ut eae omnes angulos habeant aequales; cum enim anguli non fuerint omnes aequaliter pleni, non erit exacta, ut oportet, fricatura.
When it is laid, and the proper fall is adjusted, it is to be rubbed down; so that, if the pavement is of marble, no projecting edges may arise in the diamonds or triangles or squares or hexagons; but the adjustment of the joints is to be level one with another. If it is mosaic, the edges of the tesserae are all to be level. For when the edges are not even, the rubbing down will be imperfect.
final_alignments\Vitruvius_Architecture_Book_7.json