འཕགས་པ་ཤན་ཏ་རྒྱས་པ་ཆན་པའ་སྡ་ཉ་མའ་སྙང་པ་ཞས་བྱ་བའ་མད notes.19
The Quintessence of the Sun notes.19
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notes.19
19. The day-to-night ratio of 18:12 on the summer solstice indicated in the text is only possible at a latitude of 35 degrees north, slightly north of modern-day Kashmir or Kabul (Mak 2015, pp. 65–66).