(4) Of unspeakable importance to the object of averting the formation of the neuralgic habit is the prevention of sexual irregularities in the young. Under this heading is included a large and various group of influences; of these the first that requires notice is the prevention of precocious sexual stimulation, whether by talk or by acts, which may precipitate the occurrence of puberty at an unnaturally early age. I know very well how difficult it is to devise any scheme which really would effectively control and antagonize the worst mischief of schools; but it is at least a duty to say here, that no experienced physician can doubt that such a scheme must be found, if we are ever to hope for a healthier race of children and of young men and women, and if we are to break down one of the most potent of the influences that go to the production and maintenance of the neurotic disposition. I would be clearly understood not to suppose for a moment, either that this sort of cause is usually at work in the production of neuralgia in the young, or that of itself it is sufficient to produce the disease; but I would say, for certain, that on children of nervous families such influences act with disastrous energy; and, moreover, that where we see signs, in a neuralgic young person, of that general form of bad health which is connected with precocious puberty, we may be nearly certain that such influences have actually been at work. At all cost, and by all conceivable means, all children, but most especially the delicate and nervous ones, ought to be shielded from the risk of this occurring. Another form of sexual irregularity which can be counted as a contributor to the formation of the neuralgic habit is menstrual irregularity, especially at the commencement of sexual life. By far the most mischievous in this way is menorrhagia of the young. I have seen exceedingly severe and intractable neuralgia set up by it. As regards the influence of simple amenorrhoea, I am by no means clear: it seems pretty nearly as likely that the deficient excretion (when not dependent on mechanical cause) is a mere sign of the general weakness which also predisposes to the neuralgia, as that the neuralgia is in any way the direct consequence of the amenorrhoea. Leucorrhoea, especially when profuse and long-continued, is a much more indisputable factor in many neuralgias. It is a point of real importance to put an end promptly to such a discharge, if it exists, and the usual remedies--cold bathing, mild astringent injections, etc.--should be at once prescribed.