. Memoir upon the formation of a deaf variety of the human race [microform]. Genetics; Heredity, Human; Human genetics; Génétique; Hérédité humaine; Génétique humaine. f 46 MKMOinS OP THE NATIONAL ACADEMY OF \m X/) !'â data. Stops ahould be taken towanls the collection of Hiieoial ntntiaticH, immI tlie hint itiitionH hIiouI«1 be urgtul to publiHh the innterialH in their poflHesHion. I wntte to the priucipiilH of all the iuHtitu- tiona in the country, rcim (;ontainc*l any of the required MtatiHtiua. Although my requeot was honored by a renponHe from a lar(;e num- ber of insti
. Memoir upon the formation of a deaf variety of the human race [microform]. Genetics; Heredity, Human; Human genetics; Génétique; Hérédité humaine; Génétique humaine. f 46 MKMOinS OP THE NATIONAL ACADEMY OF \m X/) !'â data. Stops ahould be taken towanls the collection of Hiieoial ntntiaticH, immI tlie hint itiitionH hIiouI«1 be urgtul to publiHh the innterialH in their poflHesHion. I wntte to the priucipiilH of all the iuHtitu- tiona in the country, rcim (;ontainc*l any of the required MtatiHtiua. Although my requeot was honored by a renponHe from a lar(;e num- ber of institutions, the information contained in the reports in reference to the subject of iiuiuiry was generally of the most meagre description. Among repressive measures should perhaps be included the influence of fViends to ]>revent undesirable intermarriages. While such action might ailect individual caseH it could n(»t greatly influence the general result. For there is no subject on which a man will so little brook interfer- ence as one of this kind where his afl'ections are involved. A due contideratwn of all the objections render* it doubtful whether legialutive Intcrfrrenve with the marriafje of the deearH to lie in the iwloption of preventive measures. In our search for such measures we shouUl be guided by the following principle: (1.) Determine the vautee that promote intemmrriageit among the deaf and dumb; and (2) renwrc them. The immediate cause is undoubtedly the preference that adult deaf-mutes exhibit for the com- panionship of deaf-mutes rather than that of hearing persons. Among the causes that (contribute to bring about this preference we may note: (1) segregation for the purposes of education, and (2) the use, as a means of communication, of a language which is ditferciit from tliat of tliu people. These, then, are two of the {wints that should be avoided in the adoption of preventive measures. Nearly all the other causes I have investigated are
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