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partial delirium, of an effort on our part toward self-control, self-possession; the taking up anew by the mind of its voluntary activity. The mind returns to self-guidance by an exertion. and false impressions are dispersed. It recognizes two states, a normal and an abnormal one; that in which the mind controls its impressions, and that in which the mind is controlled by them; and it asserts itself in behalf of the former. A kindred experience is often a salient feature of incipient insanity, and may, when a firm will accompanies the effort, oppose a strong barrier to its progress.

(6) For the very reason that we ascribe delirium to the overpowering effects of physical causes are we disposed to refer rational action to the control of the mind. If insanity is due to disease, if a disordered brain brings disordered imagery, and it is an incident of this state that physical conditions control mental ones, then we readily believe that a healthy brain may prepare the way for the reverse action, and yield itself as an obedient instrument to the spirit. Thus cramps and convulsions in the muscular system are due to the escape of stimuli from the control of the will and its automatic relations. There is something certainly in the coherence of the two kinds of facts which seems to show these dependences. Hallucinations are fixed, obstinate; sane impressions are flexible, amenable to influence. We seem to be dealing in the one case with a stubborn, physical tendency; and in the other with a changeable, moral state. In delirium, the senses cease in part to be the media of facts; the ways of ingress to the mind, like those of egress, are choked. In health, the movement inward and outward is alike free; the brain is the medium, as it should be, of activity starting from either extremity.

We affirm, therefore, a reciprocal interdependence of the brain and the mind, with a normal government of the