In the Primum Mobile of Placidus (Cooper’s translation, p. 45), the following remark and example are given: “The part of Fortune is placed according to the Moon’s distance from the Sun; and you must observe what rays the Moon has to the Sun, for the latter ought to have the same, and with the same excess or deficiency, as the part of Fortune to the horoscope. As the Moon is to the Sun, so is the part of Fortune to the horoscope; and as the Sun is to the horoscope, so is the Moon to the part of Fortune. So, in the nativity of Charles V, the Moon applies to the ultimate sextile of the Sun, but with a deficiency of 7° 45′: I subtract the 7° 45′ from 5° 34′ of Scorpio, the ultimate sextile to the horoscope, and the part of Fortune is placed in 28° 9′ of Libra.” N.B.—In this nativity, according to Placidus, the Sun is in the second house, in 14° 30′ of Pisces: the Moon in the ascendant, in 6° 45′ of Capricorn; the ascendant is 5° 34′ of Capricorn; and the part Fortune is in the ninth house, in 28° 9′ of Libra. Among the candidates for prorogation, as before-mentioned, by day the Sun is to be preferred, provided he be situated in a prorogatory place; and, if not, the Moon; but if the Moon, also, should not be so situated, then that planet is to be elected which may have most claims to dominion, in reference to the Sun, the antecedent new Moon, and the ascendant; that is to say, when such planet may be found to have dominion over any one of the places where these are situated, by at least three prorogatives, if not more; the whole number being five. If, however, no planet should be found so circumstanced, the Ascendant is then to be taken. By night, the Moon is to be elected as prorogator, provided, in like manner, she should be in some prorogatory place; and if she be not, the Sun: if he also be not in any prorogatory place, then that planet which may have most rights of dominion in reference to the Moon,[145] and the antecedent full Moon and the part of Fortune. But, if there be no planet claiming dominion in the mode prescribed, the Ascendant must be taken, in case a new Moon had last preceded the birth; but, if a full Moon, the part of Fortune. If the two luminaries, and also some ruling planet of appropriate condition, should be each posited in a prorogatory place, then, provided one luminary may be found to occupy some place more important and influential than the others, that luminary must be chosen; but should the ruling planet occupy the stronger place, and have prorogatives of dominion suitable to the conditions of both luminaries, the planet must then be preferred to either of them.[146] [145] According to her position in the scheme of the nativity.