Again taking into consideration only the congenitally deaf the results are still more striking.  Table XXXII shows that 66.5 per cent of the congenitally deaf who are of consanguineous parentage are known to have deaf relatives.

TABLE XXXI.
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|      |Consanguinity  |
|      | of Parents.   |     Per cent.
|      |-------------------------------------
|      |       |Not    |     |       |Not
Class of Deaf Relatives. |Total.|Cousins|Cousins|Total|Cousins|Cousins
------------------------------------------------------------

----------
Deaf relatives stated    |80,481| 3,911 |73,639 |100.0|100.00 |100.00
------------------------------------------------------------

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(a) relatives            |21,660| 1,850 |18,838 | 26.9| 47.3  | 25.5
No (a) relatives         |58,821| 2,061 |54,801 | 73.1| 52.7  | 74.5
|      |       |       |     |       |
(a) or (b) relatives     |25,851| 2,171 |22,552 | 32.1| 55.5  | 30.6
(a) and (b) relatives    | 4,117|   412 | 3,587 |  5.1| 10.5  |  4.8
(a) and no (b) relatives |17,543| 1,438 |15,251 | 21.8| 36.8  | 20.7
(b) and no (a) relatives | 4,191|   321 | 3,714 |  5.2|  8.2  |  5.1
No (a) or (b) relatives  |54,630| 1,740 |51,087 | 67.9| 44.5  | 69.4
------------------------------------------------------------

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Symbols for deaf relatives:  (a) deaf brothers, sisters or ancestors;
(b) deaf uncles, aunts, cousins, etc.; (c) deaf children;
(d) deaf husbands or wives.

TABLE XXXII.
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|      |Consanguinity  |
|      |of Parents.    |    Per cent.
|      |-------------------------------------
|      |       |Not    |     |       |Not
Class of Deaf Relatives     |Total.|Cousins|Cousins|Total|Cousins|Cousins
------------------------------------------------------------

-------------
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.