196 



Trans. Acad. Sci. of St. Louis. 



Table IV. 



ST. LOUIS PUBLIC SCHOOLS. 



Column " A.'^ 



114,376-=- 8,741 = 13.1 years. 



Table V. 



ST. LOUIS PUBLIC SCHOOLS. 



Column " B.'»^ 



108,345 H- 8,117 = 13.3 years. 



