If the dynamic forces of nature lie pent up in the molecules, then man must array molecular force against molecular force in order to rend rocks and tear mountains in sunder. This theory of molecular force, as extended to vital physics in the force-doctrine of life, is irreconcilably at war with the principal phenomena of life, and should be classed with the other undiscovered correlates of force, which Professor Beale speaks of as "the fictions of a mechanical imagination." The truth is that these much abused and much slandered molecules are the most innocent and harmless things in nature. They never become destructive unless some other force than that inhering in themselves drags them into its service and hurls them along a devastating path. Of themselves, they are the very quintessence of quiessence in the universe, and, when formed in nature's laboratory, at once seek quiet and loving companionship with kindred molecules, and retain it forever afterwards. The idea that they should break away from their loving molecular embrace, and, by any process of differentiation or constructive agency of their own, seek an alliance with some living dog-germ in order to be built up into living dog-tissue, presents about as perverse and wayward an impulse on the part of matter as can well be imagined by the scientific mind. That the dog-germ should seek to get hold of, and differentiate them, we can well understand. The Circean witchery and enticement is all on the part of the dog-germ, not in the inclination of the molecules.