lie along this field of our disquisition. Why should people strain so much at a gnat, after they have swallowed the dromedary? We have been following this argument through the pages of Col. Smith’s work[1] on the Human Species, with an Introduction by Dr. Kneeland. The doctor gives the views of Pritchard, Agassiz, and others, _pro_ and _con_, on this matter, and subjoins his own opinions, supporting those of Agassiz, and claiming more than one original species. Dr. Kneeland’s conclusions seem lame enough. He argues, among other things, that a human mixture is bad. He says history proves that artificial breeds and mixed races of men have no permanency, and become extinct, unless they procure supplies from a pure stock. If this be true, God help these United States of ours! Here we are receiving increments from almost all the races of the world—certainly from all those of the old world—and making a perfect _olla podrida_ of our civilization! Are we to decline, fall away, perish and become extinct, if we do not call upon the pure Celtic, Teutonic, or Anglo-Saxon stock for large periodical supplies? We hope not. Intermixture may not turn out so fatally. England has certainly drawn her strength and empire, in a great measure, from the fountain of her mongrel blood of Peghts, Britons, Celts, Romans, Danes, Teutons, Northmen, and all the rest of them. And yet there may be, after all, something in this ethnic philosophy of Dr. Kneeland. Still it is not good to despair; and, in fact, there is much to console the future of this federation, should its mingled blood grow too much diluted. Ireland is bent on coming over here bodily; and the pure Celtic blood of that island will be happily available to the veins and arteries of our debilitated body politic!