"The first difference that strikes us is colour. Whether the black of the negro reside in the reticular membrane, between the skin and scarf skin, or in the scarf skin itself; whether it proceed from the colour of the blood, the colour of the bile, or from that of some other secretion, the difference is fixed in nature, and is as real as if it's seat and cause were better known to us. And is this difference of no importance? Is it not the foundation of a greater or less share of beauty in the two races? Are not the fine mixtures of red and white, the expression of every passion by a greater or less suffusion of colour in the one, preferable to that eternal monotony, that immovable veil of black, which covers all the emotions of the other race? Add to these, flowing hair, a more elegant symmetry of form, their own judgment in favour of the whites, declared by their preference to them, as uniformly as is the preference of the oroonowtang for the black women over those of his own species? The circumstance of superiour beauty is thought worthy attention in the propagation of our horses, dogs, and other domestic animals; why not in that of man? "Beside those of colour, figure, and hair, there are other physical distinctions, proving a difference of race. They have less hair on the face and body. They secrete less by the kidneys, and more by the glands of the skin; which gives them a very strong and disagreeable odour. This greater degree of transpiration renders them more tolerant of heat, and less so of cold, than the whites. Perhaps a difference of structure in the pulmonary aparatus, which a late ingenious experimentalist, (Crawford) has discovered to be the principal regulator of animal heat, may have disabled them from extricating, in the act of inspiration, so much of that fluid from the outer air; or obliged them, in expiration, to part with more of it.