![]() ![]() Is less than 90° by l/30th of 90° or 3°, and is therefore equal to 87°. That the moon subtends one fifteenth part of a sign of the zodiac. That the breadth of the (earth's) shadow is (that) of two moons. That, when the moon appears to us halved, its distance from the sun is then less than a quadrant by one-thirtieth of a quadrant. That, when the moon appears to us halved, the which divides the dark and the bright portions of the moon is in the direction of our eye. That the earth is in the relation of a point and centre to the sphere in which the moon moves. That the Moon receives its light from the sun.
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