vocal cords are of varying proportions, and that tlie insides of their mouths 

 vary in shape. 



One hundred boys in a large high school all had their birthdays in the 

 same month of the same year. The tallest boy was twelve or thirteen inches 

 taller than the shortest. The heaviest weighed nearly twice as much as the 

 lightest. These boys differed from one another in at least two characters — 

 height and weight. Two of the boys might have been exactly the same in 

 one respect, and quite different in the other. 



If boys or girls, arranged in a row according to height, should all sit 

 down on benches of the same height, some would then appear out of place. 

 That is, people of the same height need not have trunks of the same length 

 or legs of the same length. 



Our acquaintances differ in the shapes of their eyes and in the colors of 

 their eyes, which range from pale gray to almost black. Their hair ranges 

 in color from pale yellow to black. Some have hair of various shades of red 

 to brown that do not quite fit into this series from lightest to darkest. Some 



LONG AND SHORT; THICK AND THIN 



There is great variation in the shapes of people having the same height, and greal 

 variation in the heights of people having the same weight 



62 



