The key to the failure of the prison, and a chief clue in its reform, lies in the system of administering definite and predetermined sentences by judges who, being ignorant of the nature of the individual before them, and therefore of the effect of the sentence upon him, and of its justice, are really incompetent to judge. Enough has been said of long sentences, the justice of which, it is obvious, must be quite a matter of chance. But the short-term imprisonments reveal quite as clearly the inadequacy of the system. The newspapers constantly tell of old offenders who have been in prison for over a hundred short periods. In a recent report of the Prisons Board of Ireland, the case of a woman is mentioned who was committed to Grangegorman prison thirty-four times during 1888, and never received a sentence for a larger term than fourteen days. This woman had been committed 146 times in previous years, so that she has undergone in all 180 imprisonments. Society must say, in effect, to the individual who violates its social instincts: So long as you act in a flagrantly anti-social manner, I shall exercise pressure on you, and restrain, more or less, the exercise of your freedom. I will give you a helping hand, because the sooner you begin to act socially the better it will be for both of us. I shall be glad to leave you alone, and the sooner the better; but so long as I see that you are a dangerous person, I shall not entirely leave my hold on you. That is the only attitude towards the criminal which is at once safe, reasonable, and humane. If, holding this lamp, we turn to our prison, we see at once how incompatible with such an attitude is the system of determining beforehand the exact period of the delinquent’s detention. Many a man imprisoned for life, to his own misery, the ruin of his family, and the cost of the State, might with absolute safety to the community be liberated to-day; it is unnecessary to speak further of the thousands for whom society, inside or outside prison, has done nothing, and whom it liberates, with full knowledge that they proceed at once to prey upon itself. The great fault of our prison system is its arbitrary character. It is a huge machine working by an automatic routine. The immense practical importance of criminal anthropology lies in this: that it enables us to discriminate between criminal and criminal, and to apply to each individual case its appropriate treatment.