Dee, Mercator, and Louvain Instrument Making: An Undescribed Astrological Disc by Gerard Mercator (1551)

  title={Dee, Mercator, and Louvain Instrument Making: An Undescribed Astrological Disc by Gerard Mercator (1551)},
  author={Steven Vanden Broecke},
  journal={Annals of Science},
  pages={219 - 240}
  • Steven Vanden Broecke
  • Published 2001
  • Art
  • Annals of Science
  • The present paper complements the publications of Gerard L'E. Turner on Mercator's astrolabes by presenting an account of an astrological disc which Mercator published at Louvain in May 1551. This instrument, of which only one copy is known, is described, and a transcription of its instruction sheet, with commentary and English translation, is provided. My preliminary study of the astrological content and context of the instrument indicates that it is connected with John Dee's astrological… CONTINUE READING
    6 Citations


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      Each planet has one sign in which its power is bene® ted and a diametrically opposite sign in which it is in detriment. This is the subject of Tetrabiblos, i
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      For a study of the astrological information on the horizon ring of the 1551 celestial globe, see Van Gijsen (note 12)
        Many stars on the gores of the 1551 celestial globe indeed have indications of their nature. 62 That is the front plate of the astrological instrument, above which the planetary indexes rotate
          Mercator refers to the ® xed stars and not to the planets