Nunc revertar ad propositum et de copiis, quae aptae sunt aedificiorum perfectionibus, quemadmodum videantur esse ab natura rerum procreatae quibusque mixtionibus principiorum congressus temperentur, nec obscura sed perspicua legentibus sint, ratiocinabor.
Now I will return to my undertaking and will deal with the materials which are adapted to the execution of buildings; how they seem to be generated by Nature, and in what mixtures the assemblages of elements are blended. These, indeed, are not obscure but obvious to my readers.
final_alignments\Vitruvius_Architecture_Book_2.json