FIG. 12.-Distribution of 80 cities according to the percentage of pupils retarded one year in 1908 and 1918.

22-23

BOYS.

TABLE 11.-Frequency of the ratios between the number of boys and girls retarded and the total number enrolled in cities of 25,000 population and over in 1908 and 1918— GROUP A.

1

1908 1918 1908 1918 1908 1918 1908 1918 1908 1918 1908 1918 1908 1918 1908 1918

21

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

FIG. 13.-Distribution of 80 cities according to the percentage of pupils retarded two years in 1908 and 1918.

9365-20-4

TABLE 12.-Frequency of the ratios between the number of boys and girls retarded and the total number enrolled in cities having a population less than 25,000 in 1908 and 1918— GROUP B.

1908 1918 1908, 1918 1908 1918 1908 1918 1908 1918 1908 1918 1908 1918 1908 1918

2

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

FIG. 14.-Distribution of 80 cities according to the percentage of pupils retarded three years and four years or more in 1908 and 1918.