associated with inorganic transformations of energy? In any case it is here submitted that this doctrine that infra-consciousness is associated with _all_ forms of energy is necessarily implied in the phrase mental evolution for all thinkers who have grasped the distinction between consciousness and energy. And if this be admitted there is disclosed, by implication, an answer behind and beyond that ordinarily given to a question which has again and again been asked—the question:—Is there a conservation of consciousness analogous to the conservation of energy? The negative answer generally given to this question results from the fact that the question itself has always been put in a form which does not admit of a satisfactory solution. There is not a conservation of consciousness any more than there is a conservation of neural energy or a conservation of electricity. There is no conservation of neural energy because this is only one mode of energy which may be transformed into other modes. Not until we have generalised energy so as to include _all_ its modes can we speak of conservation in reference to it. So too not until we have generalised that universal form of existence, of which consciousness is only the highest and most developed mode, so as to include all modes, can we speak of conservation in reference to it. But so generalised I submit that there is a conservation of that form of existence which includes both consciousness and infra-consciousness, co-ordinate and coextensive with the conservation of energy.[32] Just as the dominant neural transformations in the dog’s brain are like a special vortex in the onward-flowing stream of the world’s energy, so are the states of consciousness in his mind like a special vortex in the onward flowing stream of that mode of existence which, whether it have risen to the level of consciousness or not, is still of the conscious order. For the believer in scientific monism there is but one vortex, objectively presented as energy, subjectively felt in consciousness. For the dualist there are two vortices, (1) an objective vortex and (2) a subjective vortex associated with the other and “called into existence” by it. In either case the vortex is dependent for its continual existence on surrounding stores of that out of which it has arisen; and in either case the modern tendencies of scientific thought suggest conservation which is but the antithesis of creation _ex nihilo_.[33]