Agriculture, [156], [157], [158]
Aims of child-protection, [4]
Alcoholism, [79], [80], [129], [262], [267], [269]
Apprenticeship, [162], [168], [169], [170], [171]
Artificial feeding, [19], [24], [126], [127], [128], [134], [135], [137], [143], [167], [179]
Artificial selection, [25-41]. See also [Eugenics], [Euthanasia], and [Marriage and Heredity]
Atavism, [78]