Gemma Frisius, His Method of Determining Differences of Longitude by Transporting Timepieces (1530), and His Treatise on Triangulation (1533)

@article{Pogo1935GemmaFH,
  title={Gemma Frisius, His Method of Determining Differences of Longitude by Transporting Timepieces (1530), and His Treatise on Triangulation (1533)},
  author={Alexander Pogo},
  journal={Isis},
  year={1935},
  volume={22},
  pages={469 - 506}
}
  • A. Pogo
  • Published 1 February 1935
  • Sociology
  • Isis
Comments on and text of: 1. De novo modo inveniendi longitudinem (chapter XVIII of De usu globi, in Gemma's De principiis astronomiae et cosmographiae, Antwerp, 1530); 2. the first treatise on triangulation, Gemma's Libellus de locorum describendorum ratione (annexed to Apian's Cosmographicus liber, Antwerp, 1533). 
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