De Agricultura
Philo Judaeus
The works of Philo Judaeus, the contemporary of Josephus, volume 1. Yonge, C. D., translator. London: Henry G. Bohn, 1854.
Do not geometricians divide their science into two generic lines, the straight line, and the circumference? And do not other professors of other arts draw careful distinctions between the species which exist in each of their arts, going accurately through them all from beginning to end?