ABSTRACT
The succession and return of global sensible qualities within the narrow limits of a type of experience in which certain given qualities follow each other in Indian file, already form, we have seen, two sorts of geometry. However, we do not naturally imagine the geometric order of nature in this way. To the imagination a space is not a group scattered in time, but rather a simultaneous multiplicity. And if we are considering physical realities, it is even true that in this realm of changing objects their geometric order cannot be understood except in terms of their order at a given instant. Nobody really denies this; even the relativists who make simultaneity, and consequently the geometric order of nature, depend upon a system of reference. In physics, spatial order is in its very essence an order of simultaneity.
