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By Kurt H. Fremming. Occasional Papers on Eugenics. (London: Cassell and Co., 1951. Pp. 53. 3 s. 6 d.)
This is a report on a survey of a sample of the population of Bornholm with a view to establishing the incidence of mental illness. The sample consisted of all persons born from 1883 to 1887. More than 4, 000 people were studied biographically. It was found that 12 per cent. had suffered from mental disorder (including mental deficiency) at some time in their lives. 4 per cent. had had