Psychologists tell us there is a certain amount of reserve energy stored up in the body. Chiropractic maintains that it is not a matter of energy being stored up, but that this reserve energy is a question of increasing the functional current so as to increase the process of adaptation in the tissues. The degree of adaptation is represented by the difference in the current transmitted through a nerve under normal conditions, and that transmitted when the full carrying capacity of the nerve is taxed. In other words, the reserve energy is the difference between the current that is being transmitted and that which it is possible to have transmitted. As the adaptative action is increased in response to the necessity there will be, in adverse ratio, a decrease in the reserve carrying capacity of the nerve. In other words, as the current is decreased the reserve carrying capacity of the nerve is increased. The degree, therefore, of vital resistance is represented by the reserve carrying capacity of the nerve and as this is decreased there will be a like decrease in the vital resistance of the body. Some individuals are immune from certain so-called contagious dis-eases and we are told that this is because the vital resistance is greater in them than it is in others. This statement is true, but there should be some reason for this difference in resistance and Chiropractic gives us that reason. The possibility for adaptative action in the body is decreased by subluxations in the spine and its degree depends upon the combination of subluxations, the functions involved and the organs in which the functions are expressed abnormally. The question, however, arises that if there are subluxations in the spine, why are there no incoördinations but merely the possibility of decreased adaptation. To this question there is a specific answer. It is contained in the principles involved in and underlying the philosophy of Chiropractic, therefore it is not possible here to go into details. It can be considered from a general viewpoint only. There may be a combination of subluxations existing in the spine and yet not enough pressure to prevent Innate Intelligence getting a current through great enough to meet all the ordinary demands of the average environment. But when subluxations do exist and a condition arises necessitating increased functional activity, Innate, because of the decreased carrying capacity, is unable to increase the current of the periphery. Hence adaptation can not take place and there is incoördination which would not have obtained if the carrying capacity of the nerves had not been decreased by the subluxation. It must be remembered that even in the normal condition when there are no subluxations, health is a question of intellectual adaptation; that dis-ease is a question of the lack of intellectual adaptation. As the possibilities of intellectual adaptation are decreased, the possibilities of incoördination are increased.