2) that simulated a moon in the sky, producing an image of a disc observed through a colliminating lens, which made the rays of light parallel, so that the eye reacts to them as it does to rays from an infinitely distant object.
(the eye; reacts; to them) (it; does; to rays; from an infinitely distant object) (a disc; observed; ) (a colliminating lens; made; the rays of light parallel)
the eye it a disc a colliminating lens
reacts does observed made
to them
to rays from an infinitely distant object
the rays of light parallel