Copious springs are found where there are mines of gold, silver, iron, copper, lead, and the like, but they are very harmful. - Vitruvius

Let him [who would be an architect] be educated, skillful with the pencil, instructed in geometry, know much history, have followed the philosophers with attention, understand music, have some knowledge of medicine, know the opinions of the jurists, and be acquainted with astronomy and the theory of the heavens.

Pytheos made a mistake by not observing that the arts are each composed of two things, the actual work and the theory of it. One of these, the doing of the work, is proper to men trained in the individual subject, while the other the theory is common to all scholars.

There are... many... names for winds derived from localities or from the squalls which sweep from rivers or down mountains.