200 



Trans. Acad. Sci. of St. Louis. 



Table XII. 



BOSTON PUBLIC SCHOOLS. 



Column " C 



99,934 -f- 6,466 = 15.6 years. 



AVERAGE AGE OF WITHDRAWAL. 

 Table XIII. 



St. Louis. 



Column " A " 13.1 Years. 



«« "B" 13.3 " 



«« "C" < 13.5 " 



Average 13.3 Years. 



Chicago. 



Column "A" 14.4 Years. 



" «'B" 14.5 " 



" <«C" 14.7 '• 



Average 14.5 Years. 



Boston. 



Column "A" 16.2 Years. 



«' "B" 15.9 " 



" "C" 15.6 " 



Average 15.9 Years. 



Issued May 21,1896. 



