It is next to be observed, that certain degrees are anæretic; though, in the prorogation made into signs preceding, the only degree which is strictly anæretic is that of the western horizon; and it becomes so because it obscures the lord of life; while other degrees, of stars meeting with or testifying to the prorogator, both take away from and add to the aggregate amount of the prorogation, which would otherwise continue until the descension or setting of the prorogator. Of these last-mentioned degrees, however, there are none properly anæretic; since they are not borne to the prorogatory place, but, on the contrary, that place is carried to their positions.[148] In this manner the benefics increase the prorogation, but the malefics diminish it; and Mercury assists the influence of either party with which he may be configurated. The amount of the increase or diminution is indicated by the degree, in which each star, so operating, is exactly situated; for the number of years will depend upon, and correspond with, the horary times[149] proper to each degree; and if the birth be by day, care must be taken to calculate the diurnal horary times; if by night, the nocturnal. These directions are to be understood as applicable to instances wherein the degrees in question may be in the ascendant; if farther advanced, a deduction proportionate to the distance is to be made, unless they should be on the occidental horizon, in which case there can be no remainder. [148] By the apparent motion of the planetary system. On this passage, Placidus has the following observations: “In directing the significator to the west, you must consider what stars or mundane rays are intercepted between the significator and the west; if fortunate, add their arc to the significator’s arc of direction to the west; if unfortunate, subtract it from the same, and it will give the arc of direction, augmented or diminished according to Ptolemy. How largely and differently authors have spoken of this direction of the significator to the west, putting various constructions on the words of Ptolemy, is known to every one. See Cardan in his Commentaries, Maginus in Prim. Mob. and the Use of Legal Astrology in Physic, c. viii, where he delivers the sentiments of Naibod. Argol censures wholly this doctrine of Ptolemy’s, of directing the moderator of life to the west, as vain and useless; but I say it is worthy of remark, and altogether comformable to truth; because then the rays and intermediate stars of the malign only lessen the arc of direction to the west, and do not destroy life, when, by a right direction, the moderator or life does not remain at the same time with the malignant planet: for, should this happen, they kill, without any manner of doubt.” (Cooper’s translation, pp. 106 and 108.) [149] “_Horary times._” These are the number of equatorial degrees which any degree of the zodiac may appear, in a certain latitude on the earth, to transit in an equatorial hour.