No, predicting eclipses is more complicated than a simple slide rule, requiring several "cycles" to overlap. Eclipses can be predicted with a mechanical comput

No, predicting eclipses is more complicated than a simple slide rule, requiring several "cycles" to overlap. Eclipses can be predicted with a mechanical computer too. The Antikythera mechanism dates back to 2nd century bc and according to recent research, it could compute lunar eclipses with remarkable accuracy. https://en.m.wikipedia.org/wiki/Antikythera_mechanism https://en.m.wikipedia.org/wiki/Antikythera_mechanism