The sun, moon, planets, and zodiac regulated not only the life of the various limbs of living man placed under their special care, but their activity commenced at that moment when the foundation was just about to be laid for the future bodily existence of a mortal—_i.e._, at the moment of conception. If, during this critical process, the respective bodies of the heavens were in an unfortunate conjunction, the members of the future being, the most primitive forms of which had just been founded, were bound to suffer. Naturally, however, only those parts of the body were affected by this destiny which were in the care of stars that happened to be in unpropitious conjunction at the time. If the act of conception had passed without evil influence on those that were actively and passively participating in it, the product of that hour could by no means be sure that this or that planet would not maliciously thwart the ease and tranquillity of its embryonic and fetal life. For sun, moon, and the seven planets each governed one month of intra-uterine life, as is explained by Jacobus Forliviensis. Saturn reigns during the first month of pregnancy, Jupiter in the second, Mars in the third, the sun in the fourth, Venus in the fifth, Mercury in the sixth, the moon in the seventh; the eighth month is ruled again by Saturn, and this latter planet now shows itself to be so malicious that it immediately destroys all life born in the eighth month. Jupiter again takes control during the ninth month, and, as this star is fond of warmth and humidity, and, therefore, a friend of life in any form, no danger is to be feared for a fetus entering the world during this month. However, after the nine months of pregnancy have passed without evil interference by the planets, Mars once more is in command, and his influence helps in accomplishing a normal birth. After the fetus had successfully passed all dangers which the planets could cause during the nine months of intra-uterine life, and after it had successfully matured, the hour of birth might, after all, be accompanied with other quite severe sidereal complications. For if any planet was in an unfavorable sign, or if the relations between the signs of the zodiac and the sun or the moon were not quite in their regular order, those members which were presided over by the respective stars were made to suffer. The correct casting of the medical horoscope, therefore, required the most accurate knowledge of the minute of birth, with simultaneous occurrences in the canopy of heaven. Provident fathers, accordingly, were mindful of having an astrologer, during the hour of birth, in the room in which the confinement was to take place, so that he might be able to ascertain as accurately as possible the celestial occurrences which would determine the bodily welfare of the new-born, and to arrange them for the horoscope. [Illustration: FIG. 4—THE RELATION OF THE PARTS OF THE HUMAN BODY TO THE SIGNS OF THE ZODIAC]