Also the temporal series of moments only retains it as an extrinsic relation of entities and not as the outcome of the essential being of the terms of the series.
Nothing has yet been said as to the measurement of time.

Such measurement does not follow from the mere serial property of time; it requires a theory of congruence which will be considered in a later lecture.
In estimating the adequacy of this definition of the temporal series as a formulation of experience it is necessary to discriminate between the crude deliverance of sense-awareness and our intellectual theories.

The lapse of time is a measurable serial quantity.

The whole of scientific theory depends on this assumption and any theory of time which fails to provide such a measurable series stands self-condemned as unable to account for the most salient fact in experience.

Our difficulties only begin when we ask what it is that is measured.