Page 266 - 89 history of astronomy_opt

Newton proceeded to explain the other
inequalities recognised by Tycho Brahe and
older observers, and to calculate their max-
imum amounts as indicated by his theory.
He further discovered from his calculations
two new inequalities, one of the apogee, the
other of the nodes, and assigned the maxi-
mum value. Grant has shown the values of
some of these as given by observation in the
266