are said to be called into existence, we have a right to ask: Do you mean, by this phrase, creation _ex nihilo_? Or do you mean, origin by transformation? And if the latter, transformation of what? Having thus opened up these several questions, all of like implication, let us now endeavor to set forth the answer which seems most philosophical and most closely in accordance with scientific analogies. And to this end let us consider the living dog. His frame is pulsating with life and restless activity, and somehow associated with the transformations of energy in that brain of his there is consciousness—or what in the dog is the analogue of that consciousness with which alone I can claim any acquaintance at first hand, my own. Were his skin and the walls of his skull as transparent as glass; did the molecular vibrations of his brain lie open to the keenest scrutiny of the physical investigator; could we trace in detail all the varied and orderly transformations of energy of which that brain is the theatre; the accompanying consciousness would still be beyond our reach. _We_ might follow the changes of energy; he alone would feel the states of consciousness. But suppose that the dog dies. His body lies before us stiff with the _rigor mortis_. If we had weighed it previous to death, and if we were to weigh it again after death, the scales would give us no information of the departure of anything material. All signs of consciousness, however, are gone. And could we see through skin and skull into the brain, which during life was the theatre of so complex and orderly a sequence of transformations of energy, we should find that it was still and motionless. It is true that we cannot actually do this. But we know that, whereas, during life, the functional action of the brain gives rise to certain material products, at death the production of these substances ceases. We are therefore justified in saying that, omitting minor qualifications, the orderly transformations of energy in the brain and the concomitant consciousness cease together at death. Closely associated during life, varying together in health and sickness, ceasing together at death, what is the nature of their connection?