Process, Reality, Extension

In Whitehead's system, 'Process' and 'Reality' are related as Producing to Product, and 'Extensive Continuum' is an arrangement of such 'products'.  Hence, he conceives 'Extension' as inert, but with no correlative generating process.  For, in the system, the structure of Process is concrescent, and, hence, contracting, until closure, whereas Extending consists in open-ended increasing.  In other words, Whitehead cannot distinguish the participle Extending from the gerund Extension.  The result is, like Bergson's, a vestige of Cartesian 'Extension' is an otherwise innovative Vitalist system, except without the ontologically pejorative connotation.