Note 23 — PART II A COUPLE OF CENTURIES' PROGRESS.
Reading edition
Newton suspected that the moon really did so oscillate, and so it may have done once; but any real or physical libration, if existing at all, is now extremely minute.
Reading edition
Newton suspected that the moon really did so oscillate, and so it may have done once; but any real or physical libration, if existing at all, is now extremely minute.