Speculations have arisen among physiologists, as to the effect of climate and season, as well as age and temperament, on the reproductive powers. Temperate and warm climates are more prolific in exciting the copulative desire, than the frigid and uncongenial situations of the northern hemisphere. The seasons bear a somewhat near analogy—spring is supposed to be more potent than summer, autumn, or winter, in arousing the amative propensities, which, like the productions of the earth, come, as it were, at that time into a new existence. This observation is borne out by the statistical fact of there being a greater number of births about Christmas and the new year, than any other period. Man, however, is allowed to be omnivorous in _all_ his appetites; and the uniformity of his sexual greediness is preserved by diet corresponding to the season, which renders the whole twelvemonth a perpetual spring. Man, as well as other animals, is, when in a state of health, capable of procreating upon almost any food. But when there is debility of the digestive or generative organs, the injury can be repaired by the use of proper stimulating diet, thereby occasioning due and sufficient secretions. Air, exercise, health, and prosperity, are not without considerable influences. If seasons are not positively influential, certain it is, that particular lunar and solar periods are, taken in conjunction with the state of the body. “Morning,” says a French writer, “is the spring of the journey, when all the functions of the body are renovated.” Others declare, that when night veils the light of the day, the quietude and secresy thereby afforded, offer moments most congenial to the gratification of mutual love. Sexual transports should be avoided after a repast, instances having been known of apoplexy being induced by the excitement of connexion being superadded to the stimulative influence of wine and food. Henry II. consulted one Fernal for the infertility of his queen, Catherine de Medicis. The advice submitted, comprised the following notifications: Abundant and peculiar nourishment; occasional change of residence; the allowing several days to elapse between each conjugal act; and lastly, that the most favorable moment for impregnation was immediately on the cessation of menstruation. It was not until the adoption of these hints, that her majesty conceived.