Turn next to beasts; examine the head of a beautiful horse; find what proportion that bears to his body, and to his limbs, and what relation these have to each other; and when you have settled these proportions as a standard of beauty, then take a dog or cat, or any other animal, and examine how far the same proportions between their heads and their necks, between those and the body, and so on, are found to hold; I think we may safely say, that they differ in every species, yet that there are individuals, found in a great many species so differing, that have a very striking beauty.

Now, if it be allowed that very different, and even contrary forms and dispositions are consistent with beauty, it amounts I believe to a concession, that no certain measures, operating from a natural principle, are necessary to produce it; at least so far as the brute species is concerned.
SECTION IV.
PROPORTION NOT THE CAUSE OF BEAUTY IN THE HUMAN SPECIES.
There are some parts of the human body that are observed to hold certain proportions to each other; but before it can be proved that the efficient cause of beauty lies in these, it must be shown that, wherever these are found exact, the person to whom they belong is beautiful: I mean in the effect produced on the view, either of any member distinctly considered, or of the whole body together.

It must be likewise shown, that these parts stand in such a relation to each other, that the comparison between them may be easily made, and that the affection of the mind may naturally result from it.

For my part, I have at several times very carefully examined many of those proportions, and found them hold very nearly, or altogether alike in many subjects, which were not only very different from one another, but where one has been very beautiful, and the other very remote from beauty.

With regard to the parts which are found so proportioned, they are often so remote from each other, in situation, nature, and office, that I cannot see how they admit of any comparison, nor consequently how any effect owing to proportion can result from them.