The white man, as has been said, can exist everywhere, where life of any kind is possible, except the extreme North, and even here, as shown by Kane and other explorers in those bleak and barren regions, by proper precautions, or by complying with certain conditions, life is possible for certain periods. He is, doubtless, designed for the temperate latitudes, industrially considered, but, as regards climate, he is at home everywhere. Writers, ignorant of the laws of climate, and indeed ignorant of the specific character of races, have supposed that they become weak, effete, and imbecile in tropical latitudes, and this notion is, perhaps, very generally entertained by otherwise intelligent people. The population found in these regions are negro, Indian, or Malay, intermixed often with white blood, and these inferior people are supposed to be a result of climate, and to exhibit the natural consequences of a warm and enervating atmosphere! The white man under the equator, living, or rather attempting to live, the life of the negro—to labor under the rays of a vertical sun—would rapidly decline and die, for his organic structure could not resist the external influences that tend to destroy him. The _malaria_ springing from the decomposition of the rank vegetation, which ascends in the early portion and descends to the earth in the later portion of the day, would soon poison all the springs of life, and fever would close the scene. Any attempt at labor in midday would be still more rapidly fatal, for the caloric generated by the exertion, without an excretory system to relieve it, would end in fatal congestions of the vital organs, especially the brain. We constantly witness an approximation to this in our Western States and Territories, where nearly a generation voluntarily sacrifice themselves in the effort of preparing comfortable homes for their offspring. But after a certain progress is made, the causes of disease subside, and the temperate climate enables them to labor at all times.