Note 31 — Chapter II
Reading edition
Census Reports, 1880. Report on Defective, Dependent and Delinquent Classes of the Population of the United States, 1888, p. 402ff.; Census Reports, 1890. Report on Insane, Feeble-minded, Deaf and Dumb and Blind, 1895, pp. 108ff., 648; Special Reports, 1906, p. 122.