Bricks should be made in Spring or Autumn so that they may dry uniformly.

Nothing requires the architect's care more than the due proportions of buildings.

The thickness of the walls should be sufficient for two armed men to pass each other with ease.

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.

Some springs are acid, as at Lyncestus and in Italy in the Velian country, at Teano in Campania, and in many other places. These when used in drinks have the power of breaking up stones in the bladder, which form in the human body.

For not all things are practicable on identical principles

The design of a temple depends on symmetry, the principles of which must be most carefully observed by the architect.