Neither is it only over the productions of the arts, that custom and fashion exert their dominion. They influence our judgments, in the same manner, with regard to the beauty of natural objects. What various and opposite forms are deemed beautiful in different species of things? The proportions which are admired in one animal, are altogether different from those which are esteemed in another. Every class of things has its own peculiar conformation, which is approved of, and has a beauty of its own, distinct from that of every other species. It is upon this account that a learned Jesuit, father Buffier, has determined that the beauty of every object consists in that form and colour, which is most usual among things of that particular sort to which it belongs. Thus, in the human form, the beauty of each feature lies in a certain middle equally removed from a variety of other forms that are ugly. A beautiful nose, for example, is one that is neither very long, nor very short, neither very straight, nor very crooked, but a sort of middle among all these extremes, and less different from any one of them, than all of them are from one another. It is the form which Nature seems to have aimed at in them all, which, however, she deviates from in a great variety of ways, and very seldom hits exactly; but to which all those deviations still bear a very strong resemblance. When a number of drawings are made after one pattern, though they may all miss it in some respects, yet they will all resemble it more than they resemble one another; the general character of the pattern will run through them all; the most singular and odd will be those which are most wide of it; and though very few will copy it exactly, yet the most accurate delineations will bear a greater resemblance to the most careless, than the careless ones will bear to one another. In the same manner, in each species of creatures, what is most beautiful bears the strongest characters of the general fabric of the species, and has the strongest resemblance to the greater part of the individuals with which it is classed. Monsters, on the contrary, or what is perfectly deformed, are always most singular and odd, and have the least resemblance to the generality of that species to which they belong. And thus the beauty of each species, though in one sense the rarest of all things, because few individuals hit this middle form exactly, yet in another, is the most common, because all the deviations from it resemble it more than they resemble one another. The most customary form, therefore, is in each species of things, according to him, the most beautiful. And hence it is that a certain practice and experience in contemplating each species of objects is requisite, before we can judge of its beauty, or know wherein the middle and most usual form consists. The nicest judgment concerning the beauty of the human species, will not help us to judge of that of flowers, or horses, or any other species of things.