A part of the evil consequences to which this instinct is daily giving rise under the present state of things, it belongs more particularly to the moralist to point out; whilst of others it falls within the province of the physician to treat. But let me first remark that physicians have hitherto fallen far short of giving those instructions concerning this instinct which its importance demands. In books, pamphlets, journals, etc., they have laid much before the public respecting eating, drinking, bathing, lacing, air, exercise, etc., but have passed by the still more important subject now before us, giving only here and there spine faint allusion to it This, it is true, the customs, not to say pruderies, of the age have compelled them to do, in publications designed for the public eye, yet, in some small work, indicated by its title to be for private perusal, they might, with the utmost propriety, have embodied much highly useful instruction in relation to this instinct. This instinct is liable to be gratified at improper times, to an intemperate degree, and in a mischievous manner. True philosophy dictates that this and all other appetites be so gratified as will most conduce to human happiness--not merely the happiness attending the gratification of one of the senses, but all the senses--not merely sensual happiness, but intellectual--not merely the happiness of the individual, but of the human family. First.--Of the times at which this instinct ought not to be gratified. With females it ought not to be gratified until they are seventeen or eighteen years of age, and with males not until they are a year or two older. The reason is, if they refrain until these ages, the passion will hold out the longer, and they will be able to derive much more pleasure from it in after life, than if earlier gratified, especially to any great extent A due regard to health also enjoins with most persons some restraint on this instinct--indeed, at all times, but especially for a few years after the above-mentioned ages. It ought not to be rashly gratified at first. Begin temperately, and as the system becomes more mature, and habituated to the effects naturally produced by the gratification of this instinct, it will bear more without injury. Many young married people, ignorant of the consequences, have debilitated the whole system--the genital system in particular; have impaired their mental energies; have induced consumptive and other diseases; have rendered themselves irritable, unsocial, melancholy and finally much impaired, perhaps destroyed their affection for each other by an undue gratification of the reproductive instinct. In almost all diseases, if gratified at all, it should be very temperately. It ought not to be gratified during menstruation, as it might prove productive to the man of symptoms similar to those of syphilis, but more probably to the woman of a weakening disease called _fluor albus_. In case of pregnancy a