"It is exactly as if, instead of forming colonies to which all lepers are compelled to go and remain, we permitted them, after a brief term in the hospital, to go where they please and to marry and produce more lepers. The incorrigible criminal is worse than the leper because he deliberately and purposely defies society and spreads his contagion. It can hardly be questioned that the permanent segregation of the professional criminal class would very greatly diminish crime, nor can it be questioned that society has the right to adopt such a measure of protection, nor that it would not be entirely practicable." (See Journal of American Institute of Criminal Law and Criminology, April, 1912, pp. 821 f.) The only argument, and a very weighty one it is, which can be raised against the foregoing proposition, is whether the incorrigible criminal is sufficiently characterized by such unmistakable features as would enable us to recognize him when we see him, and thus justify his permanent isolation from the community. I believe he is, and the cases here reported are fair representatives of that class. Another problem which presents itself is: "Where shall we put the incorrigible criminal?" If we agree that he owes his criminality to causes over which he has no control and that the crime here is the outgrowth of a degenerative personality, a personality which is distinctly abnormal, it would seem that he belongs in a hospital rather than a penal institution, but is this unequivocally so? It is unquestionably true that these individuals are abnormal, that without actually being insane they evidence from their earliest childhood a more or less distinct deviation from the normal; they may therefore be considered as "border-line cases," _i.e._, cases which deviate from normal man and incline toward the insane through numerous gradations. As soon, however, as their abnormality manifests itself in distinct incorrigible antisocial tendencies, the right of society to protect itself from such an element must be considered. When free from actual psychotic manifestations (which very easily engraft themselves upon this degenerative soil) these individuals do not belong in a hospital for the insane. Here they serve only as a very troublesome and disturbing element, and wield an undesirable influence over many easily impressionable insane patients. They do not belong in a general penal institution because of the very deleterious influence they exert on the accidental but uncorrupted convict with whom they come in close contact in these institutions. It is my opinion that these individuals, forming as they do a distinct species of humanity, should be segregated into colonies especially designed for them, where under proper medical supervision, they should be made to earn their subsistence by means of some useful occupation. It is very obvious that an indeterminate sentence is the only rational way of approach to this problem and this