Again, the savage cannot, as a general rule, endure transplantation,--he cannot thrive in the country of the civilized man; whereas the latter, with time for training, can equal or excel him in strength and endurance on his own ground. As it is known that the human race generally can endure a greater variety of climate than the hardiest of the lower animals, so it is with the man of civilization, when compared with the barbarian. Kane, when he had once learned how to live in the Esquimaux country, lived better than the Esquimaux themselves; and he says expressly, that "their powers of resistance are no greater than those of well-trained voyagers from other lands." Richardson, Parkyns, Johnstone, give it as their opinion, that the European, once acclimated, bears the heat of the African deserts better than the native negro. "These Christians are devils," say the Arabs; "they can endure both cold and heat." What are the Bedouins to the Zouaves, who unquestionably would be as formidable in Lapland as in Algiers? Nay, in the very climates where the natives are fading away, the civilized foreigner multiplies: thus, the strong New-Zealanders do not average two children to a family, while the households of the English colonists are larger than at home,--which is saying a good deal. Most formidable of all is the absence of all recuperative power in the savage who rejects civilization. No effort of will improves his condition; he sees his race dying out, and he can only drink and forget it. But the civilized man has an immense capacity for self-restoration; he can make mistakes and correct them again, sin and repent, sink and rise. Instinct can only prevent; science can cure in one generation, and prevent in the next. It is known that some twenty years ago a thrill of horror shot through all Anglo-Saxondom at the reported physical condition of the operatives in English mines and factories. It is not so generally known, that, by a recent statement of the medical inspector of factories, there is declared to have been a most astounding renovation of female health in such establishments throughout all England since that time,--the simple result of sanitary laws. What science has done science can do. Everybody knows which symptom of American physical decay is habitually quoted, as most alarming; one seldom sees a dentist who does not despair of the republic. Yet this calamity is nothing new; the elder branch of our race has been through that epidemic, and outlived it. In the robust days of Queen Bess, the teeth of the court ladies were habitually so black and decayed, that foreigners used constantly to ask if Englishwomen ate nothing but sugar. Hentzner, who visited the country in 1697, speaks of the same calamity as common among the English of all classes. Two centuries and a half have removed the stigma,--improved physical habits have put fresh pearls between the lips of all England now; and there seems no reason why we Americans may not yet be healthy,