Note 85 — Chapter IV · Sequel to the Inductive Epoch of Hipparchus.
Reading edition
Delambre, A. A. i. 87. It is probable that his observation gave him 47⅔ degrees. The fraction 47⅔⁄360 = 143⁄1080 = 11∙13⁄1080 = 11⁄831⁄13, which is very nearly 11⁄83.