This manual, professing to be but a vehicle for topics of a professional nature only, the writer apologises for the digression, and can but express his regret, that public opinion is unfavorable to the discussion of such matters, which embrace considerations highly important to a nation, both in a moral and hygæan view. Continent persons but seldom attain old age; whereas, the married females, for instance, although exposed to the dangers of pregnancy and delivery, live generally longer than those who are unmarried or chaste; and provident married men escape the ills and snares that beset single _blessedness_, as it is called. Libertinism, on the other hand, in whatever way practised, is hurtful and destructive to long life. Continence may be a virtue, but is not imposed where marriage is allowable; and then, if deviated from with moderation only, the greatest amount of health and happiness may be elicited, and the proper end of it obtained. Matrimony, where succeeded by the birth of children, powerfully conduces to the health and happiness of women. Many female disorders are relieved by marriage. Amenorrhœa and chlorosis, disordered conditions of the uterine functions, hysteria, scrofula, skin-affections, numerous nervous disorders, and many local complaints, yield as soon as pregnancy commences. Results should, however, be well weighed, before irrevocable steps are taken. There are many diseases and structural impediments opposed to the matrimonial contract. Malformation and mental imbecility should be held as strong interdicts to the conjugal union. People ought not to marry before manhood is well developed (the male at least 21 to 23 years of age, the female 18 to 21). Precocious or late marriages are injurious to reproduction. The unnatural union of old and young of either sex with the other, entails its own miseries. A curious estimate of salacious appetites and power has been drawn up as pervading the different temperaments. The temperaments, as elsewhere noticed, are four—the Sanguine, Nervous, Bilious, and Phlegmatic. Persons of the sanguine temperament are generally of good health, and vigorous in amorous pleasures. The nervous are extremely susceptible in their sensations, and generally much given to female society. Combined with the sanguine, they are capable of great amorous excesses. The bilious temperament imparts a jealous bearing in all affairs of sexual solicitude, that detracts from the fondness and affection which so entwine a woman to a lover or a husband. The melancholic or phlegmatic person is frigid and apathetic in his amours; and love becomes with him a secondary consideration to advancement in life. These temperaments are frequently intermixed, and are much modified by age and health; and the salacious powers correspond.