Deaf-Mutism
نویسنده
چکیده
The author of this book pleads for indulgence to any shortcomings of language, on the ground that he is not an Englishman, but such indulgence is by no means necessary inasmuch as the language would do credit to any English writer. The book bristles with statistics which are, of course, drawn largely from Danish sources, but tables are also given from all countries ?f Europe as well as from America. Careful investigations are found here into the relative proportions of congenital and acquired deaf-mutism, one of the most curious features of which is the fact that the statement as to the numerical proportion between congenital and acquired deaf-mutism varies greatly in different countries. The author has carefully investigated the interesting questions of hereditary tendencies and the effects of
منابع مشابه
Consanguinity, caste and deaf-mutism in Punjab, 1921.
The effects of religion, population sub-division and geography on the prevalence of deaf-mutism were investigated using information collected in the 1921 Census of Punjab. The total sample size was 9.36 million, and comprised data on thirteen Hindu castes, seventeen Muslim biraderis and two Sikh castes. A two-way analysis of variance comparing males in Hindu castes in which consanguineous marri...
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