-------
| | |Not | | |Not
Class of Deaf Relatives |Total.|Cousins|Cousins|Total|Cousins|Cousins
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Deaf relatives stated |13,428| 1,647 |11,110 |100.0|100.0 |100.0
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(a) relatives | 5,295| 986 | 3,961 | 39.5| 59.9 | 35.6
(b) or (c), no (a) relatives| 860| 126 | 686 | 6.4| 7.6 | 6.2
No (a), (b) or (c) relatives| 7,273| 535 | 6,463 | 54.2| 32.5 | 58.2
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Symbols for deaf relatives: (a) deaf brothers, sisters or ancestors;
(b) deaf uncles, aunts, cousins, etc.; (c) deaf children.

The percentage having (a) relatives, including brothers, and sisters,
is nearly twice as great among the deaf of consanguineous parentage as
among the offspring of unrelated parents. This is not inconsistent
with the Irish returns which show the average number of deaf children
to a family to be so much greater where the parents were cousins, than
where they were not.

The statistics of the (c) relatives, or deaf sons and daughters of the
deaf, are not very full. Of the 31,334 married deaf who answered the
inquiry in regard to deaf relatives, 437 or 1.4 per cent reported deaf
children and 30,897 or 98.6 per cent reported no deaf children. Of the
totally deaf 2.4 per cent had deaf children, and of the congenitally
deaf 5.0 per cent. The percentage of deaf children varied greatly
according to the number and class of deaf relatives, as shown by Table
XXXIII.

TABLE XXXIII.
-------------------------------------------------------------------
| Percentage having deaf children.
|---------------------------------------
Class of Deaf Relatives. | |Totally |Partially |Congenitally
|Total.|deaf. |deaf. |deaf.
---------------------------|------|--------|----------|------------
(a), (b) or (d) | 1.4 | 2.4 | 1.1 | 5.0
(d) | 3.2 | 3.3 | 2.6 | 6.4
No (d) | 1.1 | 1.4 | 1.0 | 2.5
(a) and (d) | 6.3 | 6.7 | 4.3 | 7.8
(d), but no (a) | 2.2 | 2.2 | 2.0 | 4.9
(a), but no (d) | 1.4 | 2.3 | 1.3 | 2.6
No (a)