Page 99 - 89 history of astronomy_opt

he supposed that a radius drawn to the sun
from the excentric passes over equal arcs
on the equant in equal times. He then com-
puted tables for predicting the place of the
sun.
He proceeded in the same way to com-
˜
pute Lunar tables. Making use of ChaldAan
eclipses, he was able to get an accurate value
of the moon’s mean motion. [Halley, in
99