Preponderance of the vegetative principle combined with a certain slackness of tissue is the character of all organisms coming under the influence of the climate of Southern lands. In these countries an extra-ordinary stimulus acts on the mucous membrane of the genitals, and the character described will find its expression here also. Reaction will proceed not so much from the arterial side, or show itself under the guise of sthenic inflammation, but rather take the form merely of intensified secretion. What this increased secretion aims at is the removal of the abnormal stimulus, and the flow of mucus so originating manifests itself as simple, so to speak merely catarrhal, blennorrhoea. This, where the atmosphere is not impregnated with moist vapours, readily disappears, if only somewhat greater care is bestowed on the maintenance of cleanliness,—and all the more so, as re-absorption, which in hot climates acts vigorously on all the mucous membranes generally, very soon gets the upper hand again in the case of that of the genital organs, seconded as it is by the activity of the external skin. The latter is always in a condition of enhanced action at the same time, while the extent of its surface of course markedly exceeds that of the mucous membrane of the genitals. On the other hand where the atmosphere is especially moist, the activity of the skin, as well as the process of re-absorption internally, appears to be less; and so under these circumstances the mucous flow will assume more of a chronic character, but at the same time to an even greater degree be free from inflammatory reaction.