XIX the close connection between deaf
relatives of these groups and consanguinity is shown. For the sake of
simplicity no account is taken of (c) relatives (deaf children), and
(d) relatives (deaf husbands or wives), for in the first case only 370
deaf are reported as having deaf children and at the same time no (a)
or (b) relatives, and in the Second case (d) relatives are not
ordinarily blood relatives at all.

TABLE XXIX.
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| | |
| | Consanguinty |
| | of Parents. | Per cent.
| |--------------------|-----------------
| | | | | | |
Class of Deaf | | | Not | Not | | Not | Not
Relative.[A] |Total.| Cous-| Cous-| Sta- |Cous-|Cous-| Sta-
| | ins.| ins.| ted. | ins.| ins.| ted.
-----------------------------------------------------------------------
| | | | | | |
Total |89,287| 4,065|75,530| 9,692| 4.5| 84.6| 10.6
-----------------------------------------------------------------------
Stated |80,481| 3,911|73,639| 2,931| 4.9| 91.5| 3.6
Not stated | 8,806| 154| 1,891| 6,761| 1.7| 21.5| 76.8
| | | | | | |
(a) relatives |21,660| 1,850|18,838| 972| 8.5| 87.0| 4.5
No (a) relatives |58,821| 2,061|54,801| 1,959| 3.5| 93.2| 3.3
| | | | | | |
(a) or (b) relatives |25,851| 2,171|22,552| 1,128| 8.4| 87.2| 4.4
(a) and (b) relatives | 4,117| 412| 3,587| 118| 10.0| 87.1| 2.9
(a) but no (b) relatives |17,543| 1,438|15,251| 854| 8.2| 86.9| 4.2
(b) but no (a) relatives | 4,191| 321| 3,714| 156| 7.7| 88.6| 3.7
No (a) or (b) relatives |54,630| 1,740|51,087| 1,803| 3.2| 93.5| 3.3
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[A] Symbols for deaf relatives: (a) deaf brothers, sisters and
ancestors; (b) deaf uncles, aunts, cousins, etc.

Table XXIX shows unmistakably that the connection between
consanguinity and hereditary deafness is very close. Where there is
the largest amount of