Earumque camararum superiora coagmenta ex argilla cum capillo subacta liniantur; inferior autem pars, quae ad pavimentum spectat, primum testa cum calce trullizetur, deinde opere albario sive tectorio poliatur.
Of these vaulted ceilings the upper joints are to be stopped with clay and hair kneaded together. The under side, which looks to the pavement below, is to be first plastered with potsherds and lime pounded together, and then finished with stucco or fine plaster.
final_alignments\Vitruvius_Architecture_Book_5.json