_Sir Isaac Newton._--Which is the passage in Newton's _Optics_ to which
Flamsteed refers, in his account of the altercation between them, as having
given occasion to some of the enemies of the former to tax him with
Atheism? and is there any evidence, besides what this passage may afford,
in favour of Dr. Johnson's assertion, that Newton _set out_ as an infidel?
(Boswell, July 28, 1763.) The _Optics_ were not published till 1704, but
had been composed many years previously.