[10] The Survey, April 22, 1911, p. 138.

[11] "Studies of Boy Life in Our Cities (England)," edited by E. J. Urwick, 1904, p. 296.

[12] Report of Interdepartmental Committee on the Employment of Children during School Age in Ireland, 1902, p. vii.

[13] Twelfth Census of United States, Vol. II, Population, Part II, p. 506.

[14] Twelfth Census of United States, Special Reports, Occupations, 1904, pp. xxiv, cxxxiii.

[15] Idem, pp. xxiii, cxxxiii.

[16] Twelfth Census of United States, 1900, Vol. VII, p. cxxv.

[17] Instructions to Enumerators, Thirteenth Census of the United States, pp. 32-34.

[18] These tables were copied from charts displayed at the Chicago Child Welfare Exhibit, May, 1911.

[19] "The Child in the City," Handbook of the Child Welfare Exhibit, Chicago, May 11-25, 1911, p. 25.