This instrument, it will be seen, is very well adapted for the object for which it was intended; but it would, nevertheless, have escaped our inspection but for the other purposes of observation to which it has been applied by the ingenious inventor. He has measured in all about 5000 adults, registering in a book the measurement of each, with the names written by themselves. Among the autographs, we find that of Sir David Wilkie in the neighbourhood of the names of half a dozen American Indians. Here would be a new branch of inquiry for those who are addicted to the study of character through the handwriting. With such abundant materials before them, they would doubtless be able to determine the height and general proportions of their unseen correspondents. In the article of height, many men correspond to the minutest portion of an inch; but in the other proportions of the figure, it would seem that no two human beings are alike. So great is the disparity in persons of the same height, that the trunk of an individual of five feet and a half, is occasionally found to be as long as that of a man of six feet. In fact, Mr Macdonald, in an early period of his measurements, was so confounded by the difference in the proportions, that he at once came to the conclusion, that our population is made up of mixed tribes of mankind. In the midst of all this diversity, the question was, What were the proper proportions? or, in other words, What proportions constituted a handsome figure? and here our vestiarian philosopher was for a long time at a loss. At length, however, he took 300 measurements, without selection, including the length of the trunk, of the head and neck, and of the fork, and adding them all together, struck the average: from which it resulted, that the average head and neck gives 10-1/2 inches; trunk, 25 inches; and fork, 32 inches; making the whole figure, from the crown of the head to the sole of the _shoe_, 5 feet 7-1/2 inches. The word we have italicised is the drawback: a tailor measures with the shoes on; and Mr Macdonald can only approximate to the truth when he deducts half an inch for the sole, and declares the average height of our population to be five feet seven inches. On this basis, however, he constructed a scale of beauty applying to all heights: If a man of 5 feet 7 inches give 10-1/2 inches for head and neck, 25 for trunk, and 31-1/2 for fork, what should another give, of 6 feet, or any other height? The approximation of a man's actual measurement to this rule of three determines his pretensions in the way of symmetry; and the inventor of the _shibboleth_ has found it so far to answer, that a figure coming near the rule invariably pleases the eye, and gives the assurance of a handsome man. Independently of this advantage, a man of such proportions has great strength, and is able to withstand the fatigue of violent exercise for a longer period than one less symmetrically formed.