The ancients defined anger as a short madness, which would relegate it at once and entirely to the region of pathology. Without qualification, this formula cannot be accepted. So long as anger is not injurious either to the individual himself, or to others, it is normal, and even useful; for an animal or man devoid of any instinct for active defence and reprisals, would be very poorly provided. However, it must be recognised that the area of normal anger is exceedingly restricted, and that no emotion more quickly assumes a morbid character. Of the three tests which permit us to judge whether it does so or not, one—that of violent reaction on the organism—is of no use, because it gives too much scope to personal estimates and conjecture. There remain two others: the absence of rational motives, and chronicity, or excessive duration, normal anger being only a passing affection. Now, we find among mental diseases two derivatives of anger, two heightenings of this condition in paroxysmal form, and we have to establish between them a psychological difference which is the repetition of the normal state. Epileptic madness corresponds to the blind, animal, often bestial form of anger, composed entirely of violent movements and painful feelings. The maniacal state corresponds to the violent and conscious form of anger, mingled with a pleasurable element. 1. I have nothing to say of the numerous varieties of epilepsy, its concomitant hallucinations, and its intellectual and moral consequences; I confine myself to those aspects which assimilate it to anger. Even in periods of calm, the universally noted psychological traits reveal a sombre, morose, irritable, but above all, irascible disposition—the “choleric” character _par excellence_. In the paroxysmal period, we find the symptoms of anger carried to extremity: “The patient” (I borrow Schüle’s description) “throws himself on his surroundings with a blind rage, a bestial fury; he spits, strikes, bites, breaks everything he can reach, shouts and storms. His face is congested, his pupils are sometimes contracted, sometimes—and more frequently—dilated, the conjunctivæ are much injected, the look is fixed; there is abundant salivation, pulsation of the carotid, acceleration of the pulse.” Where is the starting-point of these discharges of fury, and by what mechanism are they produced? The authorities are not at one on this question, some attributing the principal share in this activity to the bulb, others to the brain. Recently an auto-intoxication of the nervous centres has been admitted. However, all this is only indirectly concerned with psychology. In the ensuing period of stupor, the acts of blind violence usually leave no trace in the memory; for it is a sort of psychological law that the intensity of consciousness should vary inversely as the intensity of the movements produced.