Culture, general. See [General Culture]

Curriculum for child-protection, [66]

Darwinism, [45], [46], [47]

Deaf-mute schools, [181]

Deaf-mutism, [180], [181], [182]

Debility, congenital, [50], [94]

Defectives, euthanasia of, [257], [258]

Denmark, [215], [230]

Diarrhœa. See [Intestinal]

Digestive disorders, [127]