Besides, our opinion that the warming and vitalizing power of the sun formed one of the most important factors in the origin of astrology is confirmed by the utterances of astrologists themselves. Thus, for instance, Ptolemy points to the sun and moon as the sources of life to mankind, and Hermes and Almansor repeat the dictum. This is furthermore proved by the unparalleled popularity which astrology has enjoyed in all phases of civilization. There is no civilized people, either of ancient or of modern times, which has not adhered to astrologic doctrines with the fullest confidence and most unswerving faith. Babylonians, Egyptians, Greeks, Romans, Germans, Romanians—in short, all nations—have professed their belief in astrology. Such a conformity of opinion would, however, be inexplicable amid such a dissimilarity of religious and cultural ideas as characterized the different peoples, unless a common principle had decisively influenced all nations in the same manner. This principle was acknowledged in the influence of the sun. Every human being was bound to observe the animating power of the sun on his own bodily sense and from his own observation, and would be at once led to the conclusion that a similar power resided also in the other celestial bodies. This conception, which to a great extent was brought about by conclusions from analogy, provided a method of inference concerning various other phenomena. Man meditated, speculated, concluded, until the required sidereal relation of each organ and each function of the human body was determined. Thus astrology may serve as one of the most telling examples of scientific delusions to which the ancient diagnostico-theoretical methods were bound to lead, with their conclusions from analogy and their deductive modes of procedure. The above survey indicates, altho only in very general outlines, the origin of astrology. We shall now consider more in detail the acquisition for which the art of medicine is especially indebted to astrology. Babylonico-Assyrian civilization possessed in its earliest ages a well-developed system of astrologic medicine, as is evident from writings bequeathed to us from antiquity. Campbell-Thompson has recently published, from the great stock of cuneiform tablets in the collection of the British Museum, 276 inscriptions of an astrological nature belonging to the so-called Kouyunjik collection. Sudhoff has compiled them, so far as they refer to medicine, and has subjected them to critical analysis. We take the liberty of repeating certain extracts from these cuneiform tablets, which appear to be the reports which Assyrian and Babylonian court astrologists made to the king. Tablet 69_a_ says: “If the wind comes from the west upon appearance of the moon, disease will prevail during this month.”