Frisius
Gemmated Frisius (To groove), Mathématicien, born with Dockum (Frise) on December 9th 1508, died with Leuwen on May 25th 1555, where he professed starting from the surroundings of the year 1529 successively the Mathématiques and the Médecine. Its treaty “ De Locorum describendorum rations ” (Antwerp, 1533) contains the oldest talk of the principles of the Triangulation and a method of determination of the Longitude S (history of the Géodésie). Its scientific contributions are thus very important in the field of the practical Cartographie.
Apart from a “ Arithmetica practicae methodus facilis ” (Antwerp, 1540), Gemma published various other works: “ De Principiis astronomiae and cosmographiae ” (1530, translated into French by Boissière in 1582); “ De Usu annuli astronomici ” (1539); “ Charta sive mappa mundi ”, dedicated to Charles Quint (Leuwen, 1540); “ De Astrolabio catholico ” (Antwerp, 1540); “ Of Radio astronomico and geometrico ” (Antwerp, 1545); “ De Orbis divisione and insulis rebusque nuper inventis ” (1548).
It opened a shop dedicated to the cartography and worked with the engravers Van der Heyden and Bollaert or Graphius of Antwerp.
Its work made of it to the chief of the geographical school Dutchwoman, whose its pupil Gerardus Mercator was most brilliant representing.
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