After the young mortal had safely arrived, and if a fortunate destiny had placed in his cradle a favorable medical horoscope, both for the hour during which the first material foundation had been laid for his life and also for the hour of his birth, he had overcome only a small part of the troubles which the starry world might be able to inflict on his bodily welfare. If the various signs of heaven appeared in unfavorable conjunction, or if the moon entered into any fatal relations with the signs of the zodiac, members of the body which were under the influence of the respective celestial bodies were still imperiled. These dangers might threaten not only one individual, but they were capable, eventually, even of calling down epidemics and pestilence upon all humanity. After any form of disease had taken hold of a person its course, treatment, and termination could be clearly read in the stars of heaven. It was necessary, above all, to ascertain the day, hour, and minute when the disease appeared. Unfortunately, this must have been quite difficult at times; for many diseases begin so insidiously that the moment of the attack is completely beyond precise definition. In such a case one did the best that could be done, and probably took as the moment of attack the first complaints of the patient regarding his disorder. After the appearance of the disease was dated in such a manner, the heavenly body, in the ascendant at this period, was then ascertained; thus, the position and the course and the phases of the moon, the relations of sun and moon to the twelve signs of the zodiac, and the planets would be noted. It was necessary to observe whether the moon was in opposition, quadrature, or conjunction to the planets while she stood in the sign of this or that figure of the zodiac. From these observations clear conclusions were first drawn regarding the general condition, the character, the duration, and the prognosis of the affection. These conclusions, however, were by no means satisfactory as yet. An attempt was therefore made to obtain a much more detailed insight into the causes, complications, and therapy of the case in question by means of astrology, and such information was abundantly provided in the _Medicina Astrologica_.