circumstances in distant countries were afterwards to develop into like forms. But anyhow it is impossible not to trace the supremacy of Teutons, Greeks, and Romans in part to their common form of government. The contests of the assembly cherished the principle of change; the influence of the elders insured sedateness and preserved the mould of thought; and, in the best cases, military discipline was not impaired by freedom, though military intelligence was enhanced with the general intelligence. A Roman army was a free body, at its own choice governed by a peremptory despotism. The MIXTURE OF RACES was often an advantage, too. Much as the old world believed in pure blood, it had very little of it. Most historic nations conquered prehistoric nations, and though they massacred many, they did not massacre all. They enslaved the subject men, and they married the subject women. No doubt the whole bond of early society was the bond of descent; no doubt it was essential to the notions of a new nation that it should have had common ancestors; the modern idea that vicinity of habitation is the natural cement of civil union would have been repelled as an impiety if it could have been conceived as an idea. But by one of those legal fictions which Sir Henry Maine describes so well, primitive nations contrived to do what they found convenient, as well as to adhere to what they fancied to be right. When they did not beget they ADOPTED; they solemnly made believe that new persons were descended from the old stock, though everybody knew that in flesh and blood they were not. They made an artificial unity in default of a real unity; and what it is not easy to understand now, the sacred sentiment requiring unity of race was somehow satisfied: what was made did as well as what was born. Nations with these sort of maxims are not likely to have unity of race in the modern sense, and as a physiologist understands it. What sorts of unions improve the breed, and which are worse than both the father-race and the mother, it is not very easy to say. The subject was reviewed by M. Quatrefages in an elaborate report upon the occasion of the French Exhibition, of all things in the world. M. Quatrefages quotes from another writer the phrase that South America is a great laboratory of experiments in the mixture of races, and reviews the different results which different cases have shown. In South Carolina the Mulatto race is not very prolific, whereas in Louisiana and Florida it decidedly is so. In Jamaica and in Java the Mulatto cannot reproduce itself after the third generation; but on the continent of America, as everybody knows, the mixed race is now most numerous, and spreads generation after generation without impediment. Equally various likewise in various cases has been the fate of the mixed race between the white man and the native American; sometimes it prospers, sometimes it fails. And M. Quatrefages concludes his