This whole natural course is left behind in the play on the screen.

The deviation from reality begins with that resolution of the continuous movement which we studied in our psychological discussions.

We saw that the impression of movement results from an activity of the mind which binds the separate pictures together.

What we actually see is a composite; it is like the movement of a fountain in which every jet is resolved into numberless drops.

We feel the play of those drops in their sparkling haste as one continuous stream of water, and yet are conscious of the myriads of drops, each one separate from the others.