It is true that it is only through the exercise of the conceptual faculty of reason, never through the senses or by direct perception, that we can reach this suggested infra-consciousness. But this will hardly be regarded as a valid objection by those who believe in the existence of the ether, or by those who adopt the atomic theory, neither of which could be reached by the senses or by perception alone. Still less will it be regarded as an objection by those who have grasped the distinction between energy as manifested in the objective world, and consciousness as inevitably subjective. Of no consciousness other than our own have we direct and first-hand experience. And yet certain manifestations of energy as exhibited by other living beings force upon us the conviction that we are not alone in possessing the subjective attribute of consciousness. That not only the dog and the elephant, but the bee also and the spider are endowed with this attribute and are conscious, though not self-conscious, few of us doubt for a moment. But their consciousness is presumably far simpler than ours. Carrying this simplification yet farther down the scale of animal life, we reach in the jelly-fish, the sea-anemone, and the sponge, forms of life which can hardly be said to be conscious at all with a consciousness comparable to our own. Yet they would seem to be endowed with the dim foreshadowings of such consciousness. Finally in the amœba and the monad we have these dim foreshadowings reduced to the lowest terms that are suggested by the study of organic life. If, then, in the series of organic forms, down even to the lowest, we admit consciousness or its foreshadowing, though it lies and must ever lie beyond the reach of our senses, why should we hesitate to generalise our belief in logical and scientific form, and hold that all organic modes of energy are associated with conscious or infra-conscious states?[30] It may perhaps, be objected that such a view, carried to its logical conclusion involves the supposition that all the tissues of the body are conscious or at least infra-conscious, whereas it is a well-established scientific conclusion that consciousness is specially associated with the nervous tissue of the brain. I see no reason, however, why this conclusion should not be accepted. If the organic transformations of energy in the ovum are associated with what for lack of a better term I have here called infra-consciousness, then there are two possibilities. Either the accompanying consciousness is _entirely_ concentrated in association with the molecular vibrations of the brain; or it merely becomes _dominant_ in the functioning of that tissue and continues in the dim infra-conscious condition in the other tissues of the body. Now to judge from our own experience it is only the dominant molecular vibrations in the brain that are accompanied by the clear light of consciousness. The sub-dominant neural changes are indeed accompanied by