[58]. Poverty,—A Town Study, by B. S. Rowntree.
[59]. In the pamphlet, The Cost of Child Labor, above referred to.
[60]. Annual Report of the Massachusetts State Board of Health, 1877.
[61]. Growth of St. Louis School Children, by William T. Porter. Report of the Academy of Science of St. Louis, vol. vi, pp. 263–380.
[62]. Special Report of Anthropological Investigation of 1000 white and colored Children of the New York Juvenile Asylum, by Dr. Hrdlicka.
[63]. Report of the Royal Commission on Physical Training (Scotland), p. 30.
[64]. State Maintenance, by J. Hunter Watts, p. 10.
[65]. Adolescence, by G. Stanley Hall.
[66]. Feeble-minded Children in the Public Schools, by Will S. Monroe.
[67]. The Cost of Child Labor, pamphlet quoted above.