And it may be that it is scarcely worth while for architects and designers to take any greater pains than they do to arrive at mathematical accuracy in those things which, after all, have only an æsthetic value. The first Diana on the tower was too large; but if a thousand had been randomly gathered in Madison Square Garden, and a census of their opinions taken, it would probably have been found that the vote stood something like this: 50 would have thought the statue 15 feet high; 100, 10 feet; 200, 8 feet; 200, 6 feet; 200, 5 feet; 100, 4 feet; 100, 3 feet; 50, 2 feet. The statue, which was at an elevation of 325 feet from the ground, was really 18 feet in height. The present statue, which has replaced the one of which I have been speaking, is 13 feet high. The percentage of persons having normal vision is very small, and those who by the use of glasses or spectacles correct such defects are also comparatively small, if we except those who realize the impairment of their vision as they realize, after the meridian of life has been passed, the impairment of other faculties. Children, as a rule, have normal vision; but I am assured by numerous practical opticians that not more than ten per cent. of the men and women who have passed their twenty-first birthday still have normal vision; and when a person has got beyond forty-five and can still see with the accuracy of youth, then that person affords so exceptional a case as to be worthy to be placed among the living curiosities. A small percentage of persons with abnormal vision see large, but, as a rule, eyes that are not as they should be see objects in a diminished form.