[146] Placidus, in remarking on the nativity of John di Colonna, after stating his opinion that it is an error to suppose that a malign influence to the horoscope, when the horoscope has _not_ the primary signification of life is anæretic, says, that “the order and method which Ptolemy lays down for the election of a prorogator are quite absurd, unless life be at the disposal of a sole prime significator only.” He proves by other arguments also, and by instances of the fact, that “_one only_ signifies life, elected according to Ptolemy’s method.” (Cooper’s translation, p. 184.) CHAPTER XIV NUMBER OF THE MODES OF PROROGATION When the prorogator has been determined as above directed, it is also necessary to take into consideration the two modes of prorogation; one into succeeding signs, under the projection of rays, as it is called; and, when the prorogator may be in an oriental place, that is to say, in any place between the mid-heaven and the ascendant, this mode only is to be used. The other mode extends into signs preceding the prorogator, according to what is called horary proportion[147]; and, in cases when the prorogator may be situated in any place receding from the mid-heaven, or, in other words, between the mid-heaven and the angle of the west, both modes of prorogation are to be adopted. [147] “_Horary proportion._” So the Perugio Latin of 1646; the Greek word, however, is ωριμαιαν, which seems to be compounded of ωρα and ιμαω; and, if so, the literal signification would be “extraction of hours.”