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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    as Meniere's, was, however, of opinion that at least seven-tenths of the parents of deaf-mutes were over 30 at the time of the birth of the deaf-mute offspring, but he agreed with Meni£;re in supposing that in such marriages—as in those between j^ounger persons resuking in deaf-mute children—the wife was, as a rule, several years older than the husband [64, p. 21]. Later investigations have not confirmed the opinions of Meniere and Puybonnieux. It may be men- tioned in particular that H. Schmaltz in Saxony, and Lemcke in Mecklenburg-Schwerin, came to the con- clusion that the age and the difference in the age of the parents of deaf-mutes were of no significance. An examination into the ages of the parents of the 553 Danish deaf-mutes led to a similar result, and showed further that the average age of the parents at the birth of the deaf-mute did not differ greatly when the cases in question were divided into congenital and acquired cases, the difference in age of the parents being also about the same in both groups. The average age of mothers at the birth of congenital deaf-mutes was 33-9, and of the fathers 34-2 ; while the figures for the parents of deaf-mutes with acquired deafness were respectively 30-1 and 327.* CIRCUMSTANCES RELATING TO OFF- SPRING.—Various authors have proved that certain peculiarities connected with the offspring of marriages producing deaf-mutes must be considered as being ♦ It may be remarked by way of comparison that Ruuin and WESxiiRGAARD found that the average age of Danish cottagers (to wliich class the majority of Danish deaf-mutes belong by birth) at marriage was for men 327, for women 30 6. H
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