80 H. B. MARSHALL : PEESENTATION AND REPBESENTATION. presentative elements can be treated as we treat stable molecular complexes combining them to produce quasi mental alloys (as emotions have been held to be mix- tures of pleasures and pains) ; or summating them to form new products of a nature quite different from the agglutin- ated elements ; or, when forming these new presentations, again re, and re-re, and re-re-re-presenting them in new series to form still new products, until within the vague mists of an unending regression we lose ourselves ; and resting satisfied with mysteries of our own creation set for ourselves utterly artificial limits to our own ability to grasp the true nature of the facts which present themselves to us for explanation and co-ordination.
