The Ten Books on Architecture, 9.2.1

Vitruvius  Parallel editions

‹‹‹ Vitr. 9.1.16 | Table of Contents | Vitr. 9.2.2 ›››

Gwilt translation

2Berosus, who travelled into Asia from the state or country of the Chaldeans, teaching his doctrines, maintained that the moon was a ball, half whereof was luminous, and the remaining half of a blue colour; and that when, in its course, it approached the sun; attracted by the rays and the force of the heat, it turned its bright side in that direction, from the sympathy existing between light and light; whence, when the sun is above it, the lower part, which is not luminous, is not visible, from the similarity of its colour to the air. When thus perpendicular to the sun’s rays, all the light is confined to its upper surface, and it is then called the new moon.

Morgan translation

2According to the teaching of Berosus, who came from the state, or rather nation, of the Chaldees, and was the pioneer of Chaldean learning in Asia, the moon is a ball, one half luminous and the rest of a blue colour. When, in the course of her orbit, she has passed below the disc of the sun, she is attracted by his rays and great heat, and turns thither her luminous side, on account of the sympathy between light and light. Being thus summoned by the sun’s disc and facing upward, her lower half, as it is not luminous, is invisible on account of its likeness to the air. When she is perpendicular to the sun’s rays, all her light is confined to her upper surface, and she is then called the new moon.