Page 210 - 89 history of astronomy_opt

points in the neighbourhood of that centre.
5. If the earth and moon were not re-
tained in their orbits by vital force ( aut alia
aligua aequipollenti ), the earth and moon
would come together.
6. If the earth were to cease to attract
its waters, the oceans would all rise and flow
to the moon.
7. He attributes the tides to lunar at-
210