Deaf-mutism / by Holger Mygind.

  • Mygind Holger, 1855-1928.
Date:
1894
Catalogue details

Licence: Public Domain Mark

Credit: Deaf-mutism / by Holger Mygind. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    from 0-5 years of age. For instance, the Irish census of 1880 only gave 35 deaf-mutes belonging to this period of age [149, tab. 107, p. 290], and in the English census of 1881 there were only 498 deaf- mutes under 5 years of age [156, p. 63]. This cir- cumstance is even felt in the period of age from 5-8; this has been plainly proved in Denmark, where, in 1885, the numerical proportions of the periods of age suddenly fell at the age of 8 [Diagram in 200, p. 384], and there is every reason to believe that the number of deaf-mute children not included in the statistics represents at least 10 per cent, of the whole deaf-mute population, and that it may amount to 25 per cent, of the same. Another fault is that most deaf-mute statistics em- bracing countries or provinces, reckon the rate of deaf-mutes in relation to the actual population of the country. As this consists of the native population minus emigrants and plus immigrants, and as the number of these latter fluctuates greatly in different countries, while the deaf-mute population is more constant, it is evident that statistics, which do not pay sufficient attention to emigration and immigra- tion, must be unreliable as to the proportion of deaf- mutes found. Further, many statistics give no further information as to the manner in which the material on which they are based has been obtained ; indeed some are entirely silent upon this subject. Often there is no information as to how the proportion of deaf-mutes has been arrived at ; for instance, if by grouping them according to place of residence, or place of birth. Information is also often wanting whether
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