is that invented by Claudius Ptolemaeus, a celebrated astronomer and mathematician of Pelusium, in Egypt, who lived in the beginning of the IIId century of the Christian era.

This hypothesis supposes the earth immovably fixed in the centre, not of the world only, but also of the universe. verse; and that the sun, the moon, the planets, and stars, all move about it, from east to west, once in twenty-four hours, in the order following, viz., the moon next to the earth, then mercury, venus, the sun, mars, jupiter, saturn, the fixed stars, the first and second crystaline heavens, and above all the fiction of their primum mobile.