Note that, except for the Banū Amājūr’s fourth lunar eclipse, there is a negative systematic deviation in their computed time errors from our corresponding recomputed values, with an average of ~ − 21 min. I do not know the precise reason for this, but it has no influence on ...
which did not exist at Eratosthenes’ time. If the comparison had been made this way, one would have unavoidably obtained different coefficients (exactly, as modern historians of science do). Were the ancient scholars able to average the majority of the results...