"These reasons founded upon the organic mechanism of our bodies seem quite conclusive. There is no doubt that the intense heat which we suffer during the greatest part of the year in the countries near the equator promotes evaporation too much. But I dare to assert that the excess is being insensibly recovered by the bodies through the particles produced by perspiration. This does not seem chimerical, when we reflect that by our constant respiration the air in which we are living enters and is being constantly renewed in our liquids, and that this air is impregnated with innumerable corpuscles extracted from the solids. The same is true of a fountain, the surplus flows off to fertilize the near forest, while at the same time is restored to its bosom through different means an equal quantity, which incessant infiltration also supplies from other water sources." After comparing the physical and intellectual aptitude of the children of the tropics with those of Greenland and the progress made by the French of Hayti in science, agriculture and art, which is in diametrical contrast to that of the Spanish West Indians, he continues: "Therefore, as indolence or laziness do not proceed from external causes, we must admit that they proceed from ourselves. I find no other source. It is a voluntary habit, or speaking more plainly, a vice propagated like the pestilence and causing incalculable harm to the social structure. But as I propose to combat this enemy, I shall show the most visible injuries it produces in those who yield to its insidious charm. "Every living body without movement goes into corruption. This is a well established principle and in the hot countries which are usually humid, the effect is quickly seen. We have a sad experience in this city, where the inhabitants are frequently afflicted with dropsy, internal and external tumors, hypochondria, nervous diseases and many other ailments, the origin of which is inaction or want of movement and circulation. While in this respect indolence conspires against our very existence, the injury is no less when it manifests itself in the vices to which professional idlers are subject. Incessant gambling, excessive sensuality, late hours, unreasonable food and drink and other correlative features are the means by which health is ruined, life is shortened; and he who succeeds in prolonging it, does so at the cost of a variety of aches and pains. "Prisons and other dismal places are the final abode of idleness. Those liable to get there for theft, debt and other offences curse their unhappy lot; but they will not admit that their laziness is the chief source of their misfortunes. Celibacy, depopulation, the languishing of commerce, the backwardness of science, art, agriculture, etc., are all the results of idleness.