The prophylaxis of degeneracy in the mother and father may be summed up as simply the prevention of a state of neurasthenia, or nervous exhaustion, whether this condition (involving the functions of growth, motion and sensation, which, as Marinesco has shown, exist in every neuron and its processes) exhibit itself in the general nervous system or in the organs connected with alimentation, elaboration, and excretion. Every factor of acquired degeneracy produces what is practically this condition of neurasthenia ere exerting any influence in the production of degeneracy. In other words, the neurasthenia of the ancestor becomes the neurosis of the descendant. Therefore the neurasthenia requires in its treatment in the ancestor the removal of the exciting cause and the treatment of the effect by physiologic rest in the truest sense of the word. In a general way, therefore, the ordinary principles of hygiene applied to each individual case will suffice to prevent development of this neurasthenia. The part of Government in this is very small. It is true here that, as remarked by Johnson-- "How small of all that human hearts endure, That part which kings or laws can cure!" Training of the individual rather than governmental regulation must be the factor to prevent degeneracy in the ancestor. Indeed governmental regulation by injuring self-reliance (that factor so easily destroyed and so hardly regained) may itself be a potent factor in degeneracy. Prophylaxis of degeneracy in the individual should commence with the birth of the child. Whatever may be said of hypothetical ante-natal training, there is no doubt that considerable benefit can be accomplished during the first months of life. As the great aim of training is to secure self-control, it must be obvious that to accustom an infant to expect attention at every moment it cries, whether the cry be the expression of need or not, is to weaken, not to strengthen, its self-control. Furthermore, regularity in bodily functions is a great source of strength. The child can be trained during the first months of life by careful attention to its wants on the one hand, and as careful inattention to its caprice on the other, so that all its functions become equably regular and automatic. With this regularity many of the factors underlying caprice, peevishness, and anger can be prevented in the earliest months of life. Unless there be enormous deficiency in the associating fibres a good start can then be made toward the creation of a secondary ego. It is at this period and during that of the first dentition that training is too often neglected or perverted in such a way as to strengthen the primary ego at the expense of the secondary. At this period the extent of training needed may be judged by the amount of stigmata, few though they be, present in the child. With the period of the first dentition certain mental and nervous stigmata manifest themselves. If the child be liable to