Various, Popular Science Monthly (1911)
“ Their problem is that of the London slums, of sweat-shops and child-labor, of wasting overwork and of lack of nutrition, of premature old age and of' sodden drunkenness—influences which bring about the degeneration of the individual, the inefficiency of the social group, but which for the most part leave no trace in heredity and are therefore no factor in the degeneration of the race. ”
