THE FOKMATION OF A DEAF VAKIETY OF THE HUMAN RACE. 



193 



may be able to apiJioximaU; to llic order ol' the iiianiaj>es by classityiiig- the pupils according to 

 their period of birth. Although 1 have not attempted a minute clas.sitication, excepting in the 

 cases shown in the Api)endix, it is comparatively easy to arrange all the married pupils referred to 

 above into four cla.sses: (1) those born before 1810; (2) those born in the period 1810-18.39; (.H) those 

 born in the period 18^0-18511; (1) those born since the comiueucement of LStJO. The results are 

 shown in the following table: 



Table XXL 



Period of birtli. 



Before 1810... 

 1810 to 1839 .. 

 18-40 to 1859 . . 

 1860 aud after 



Total 

 recorded 

 to have 

 married. 



129 

 715 

 233 



12 



: Total 



recorded 



to have 



married 



deat'-uiutes. 



Percent- 

 age. 



72 

 .577 

 1116 



11 



5.5.8 

 80.7 

 84.1 

 91.7 



The number married who were born-sinee 1859 is too small to be relied upon for a percentage. 

 It is only to be hoped that the percentage given above is excessive. The indications are very 

 clear, however, that of the deaf and dumh who marry, the proportion icho marry deaf-mutes has 

 steadily increased: This conclusion is strengthened when we find that the above result, which has 

 been deduced from a summation of all the cases recorded in the reports of the American Asylum, 

 New York, Indiana, Ohio, aud Illinois institutions, is also true of the cases recorded in each report 

 taken separately. This will be obvious from the following table : 



Table XXII. 



The only institution that gives any indication of a decrease in the proportion of pupils mar- 

 ried to deaf-mutes is the American Asylum. The pui)ils born in 18.59 were only 18 years of age 

 S. Mis, 110 2.5 



