Ptolemy's Tetrabiblos · Ptolemy
PREFACE
It has been truly said, that “Ptolemy’s order, false as it was, enabled observers to give a plausible account of the motions of the Sun and Moon, to foretell eclipses, and to improve geography[10];” or, in other words, that it represented the actual phenomena of the heavens as they really appear to a spectator on the earth. It is therefore clear that Ptolemy’s astrology is just as applicable to modern and improved astronomy as it was to his own.[11] [9] In France, about the beginning of the 16th century, Oronce Finé, the Royal Reader, attempted, under the patronage of Francis I, to produce an astronomical clock, in which everything moved according to the principles of Ptolemy. It was kept, about fifty years ago, in the monastery of St. Geneviéve, at Paris. In Lilly’s Catalogue of Astrological Authors, Orontius Finæus is mentioned as the writer of a work on the twelve houses of heaven, printed in Paris, 1553. [10] _Spectacle de la Nature._
In the year 827[12] the “Great Construction” was translated by the Arabians into their own language, and by them communicated to Europe. It is through them that it has been usually known by the name of the Almagest. In the 13th century, the Emperor Frederic II caused it to be translated from the Arabic into Latin, and Sacrobosco[13] was consequently enabled to write his famous work upon the sphere. It was not, however, until about the end of the 15th century that the “Great Construction” was translated into Latin from the _original_ text; and this important service was rendered to science by Purbach, a professor of philosophy at Vienna, who learned the Greek tongue at the instigation of Cardinal Bessarion. By means of this translation, the Ephemerides of George Müller, surnamed Regiomontanus, a disciple of Purbach’s, were first composed. The Greek text of the Almagest, or Great Construction, was first published at Basle, by Simon Grynæus, in 1538; and it was again printed at the same place in 1551, with certain other works of Ptolemy.[14] The rest of Ptolemy’s works connected with astronomy, and now extant, are the Tetrabiblos, or Four Books of the Influence of the Stars[15] (now translated); the Centiloquy, or Fruit of his Four Books, being a kind of supplement to the former; and the Significations of the Fixed Stars. The last is merely a daily calendar, showing the risings and settings of the stars, and the nature of the weather thereby produced. There are likewise extant his geographical work (which has rendered important service to modern geographers), and also his celebrated book on Harmonics, or the Theory of Sound.
Text from Project Gutenberg, public domain in the United States.