This conclusion leads to the assertion of the essential uniformity of the momentary spaces of the various time-systems, and thence to the uniformity of the timeless spaces of which there is one to each time-system.
The analysis of the general character of observed nature set forth above affords explanations of various fundamental observational facts: ({alpha}) It explains the differentiation of the one quality of extension into time and space.

({beta}) It gives a meaning to the observed facts of geometrical and temporal position, of geometrical and temporal order, and of geometrical straightness and planeness.

({gamma}) It selects one definite system of congruence embracing both space and time, and thus explains the concordance as to measurement which is in practice attained.

({delta}) It explains (consistently with the theory of relativity) the observed phenomena of rotation, _e.g._ Foucault's pendulum, the equatorial bulge of the earth, the fixed senses of rotation of cyclones and anticyclones, and the gyro-compass.

It does this by its admission of definite stratifications of nature which are disclosed by the very character of our knowledge of it.