Then A_1, A_2, A_3, etc.

intersect M in parallel levels l_1, l_2, l_3, etc.

Then the relative order of the parallel levels in the space of M is the same as the relative order of the corresponding moments in the time-system {alpha}.

Any rect in M which intersects all these levels in its set of puncts, thereby receives for its puncts an order of position on it.

So spatial order is derivative from temporal order.