“Fresh pitsand, however, in spite of all its excellence in concrete structures, is not equally useful in stucco, the richness of which, when the lime and straw are mixed with such sand, will cause it to crack as it dries on account of the great strength of the mixture. But river sand, though useless in "signinum" on account of its thinness, becomes perfectly solid in stucco when thoroughly worked by means of polishing instruments.”
![“The [engineer] should be equipped with knowledge of many branches of study and varied kinds of learning, for it is by his judgement that all work done by the other arts is put to test. This knowledge is the child of practice and theory.” quote by Marcus Vitruvius Pollio](https://sms4smile.com/quotes/img-quotes/afa/marcus-vitruvius-pollio-7498_art_the-engineer-should-be-equipped-with-kno_386834.jpg)
