In what I have said thus far I have had another purpose in view than that of a mere exposition of the psycho-physiological theory of memory. This other and chief purpose has been to lay the foundation for a conception of the _Unconscious_ in its larger aspect. We have seen that thoughts and other conscious experiences that have passed out of mind may be and to an enormous extent are conserved and, from this point of view, may be properly regarded as simply _dormant_. Further we have seen that all the data collected by experimental pathology and other observations lead to the conclusion that conservation is effected in the form of neurographic residua or brain neurograms—organized physiological records of passing mental experiences of all sorts and kinds. We have seen that these neurographic records conserve not only our educational acquisitions and general stock of knowledge—all those experiences which we remember—but a vast number of others which we cannot spontaneously recall, including, it may be, many which date back to early childhood, and many which we have deliberately repressed, put out of mind and intentionally forgotten. We have also seen that it is not only these mental experiences which occupied the focus of our attention that leave their counterpart in neurograms, but those as well of which we are only partially aware—absent-minded thoughts and acts and sensations and perceptions which never entered our awareness at all—subconscious or coconscious ideas as they are called. Finally, we have seen that the mental experiences of every state, normal, artificial, or pathological, whatever may be the state of the personal consciousness, are subject to the same principle of conservation. In this way, in the course of any one’s natural life, an enormous field of neurograms is formed representing ideas which far transcend in multitude and variety those of the personal consciousness at any given moment and all moments, and which are far beyond the voluntary beck and call of the personal consciousness of the individual.