Our necessities have taught us to mould matter into various shapes, and to give them fit proportions for particular uses, as bottles, glasses, knives, dishes, &c. Hath not offence given rise to the form of the sword, and defence to that of the shield? And what else but proper fitness of parts hath fix'd the different dimensions of pistols, muskets, great guns, fowling-pieces and blunderbusses; which differences as to figure, may as properly be called the different characters of fire-arms, as the different shapes of men are called characters of men. We find also that the profuse variety of shapes, which present themselves from the whole animal creation, arise chiefly from the nice fitness of their parts, designed for accomplishing the peculiar movements of each. And here I think will be the proper place to speak of a most curious difference between the living machines of nature, in respect of fitness, and such poor ones, in comparison with them, as men are only capable of making; by means of which distinction, I am in hopes of shewing what particularly constitutes the utmost beauty of proportion in the human figure. A clock, by the government's order, has been made, and another now making, by Mr. Harrison, for the keeping of true time at sea; which perhaps is one of the most exquisite movements ever made. Happy the ingenious contriver! although the form of the whole, or of every part of this curious machine, should be ever so confused, or displeasingly shaped to the eye; and although even its movements should be disagreeable to look at, provided it answers the end proposed. An ornamental composition was no part of his scheme, otherwise than as a pollish might be necessary. If ornaments are required to be added to mend its shape, care must be taken that they are no obstruction to the movement itself, and the more as they would be superfluous, as to the main design.--But in nature's machines, how wonderfully do we see beauty and use go hand in hand! Had a machine for this purpose been nature's work, the whole and every individual part would have had exquisite beauty of form without danger of destroying the exquisiteness of its motion, even as if ornament had been the sole aim; its movements too would have been graceful, without one superfluous tittle added for either of these lovely purposes.--Now this is that curious difference between the fitness of nature's machines (one of which is man) and those made by mortal hands: which distinction is to lead us to our main point proposed; I mean, to the shewing what constitutes the utmost beauty of proportion.