74 
The Non-Inheritance of Sex in Man 
house from which she came. The sexes of children which her mother gave birth 
to were thus obtained, aud were placed in the columns at the right of the columns 
containing the figures for the younger generation. Next, the sexes of the children 
in the father's generation were recorded and can be seen in the left-hand columns 
just below the children's (see Table I). This record was repeated for every gene- 
ration back to the beginning of the seventeenth century. All the families, 
touched upon at all, have been studied completely, and are in general the same 
houses the records of which I used in a study "Mental and Moral Hereditj' in 
Royalty." These families are to be classified among the more famous branches of 
royalty, the genealogical and biographical records of which are seldom difficult to 
obtain even on the female side. Several families in von Behr's genealogy have 
been entirely unutilized in this research. I have omitted them merely to save 
time. They are such families as have made frequent alliances outside the strictly 
royal houses, and consequently one could not find the maternal records in von Behr. 
This omission should have no effect on the general averages. 
In the illustrative table below we see the distribution of sex among the 
children of different fraternities for several generations. Thus the figures within 
the block for the Hapsburgs (page 208 of" von Behr ") give us the history of the sex 
distribution in that house during two centuries. In the upper left-hand corner we 
see the figures 1 and 3. This means one male and three females were born in the 
last generation which this family produced prior to 1800 a.d. These children were 
Maria Theresa, her one brother aud two sisters. Their mother was Elizabeth of 
Brunswick who was found to have been one of four sisters. This fact is recorded 
in the figures 0 and 4 just to the right of 1 and 3. Their father was Charles VI 
of Austria, of a family of three boys and eight girls, which fact is recorded just 
below the figures 1 and 3. The ancestry of Charles VI's fraternity of 3 boys to 8 
girls was next taken up and so on back to the parents of the fraternity reading 
6 and 9, which was the most ancient studied. In the first three fraternities 1-3 ; 
0-4 ; and 3-8, we see an apparent inherited tendency towards the birth of girls. 
Our averages and correlation coefficient show, however, that this is but a meaning- 
less accident. 
In order to obtain material sufficient to give me a low probable error, I added 
to the facts drawn from von Behr, some statistics taken from Burke's " Peerage and 
Baronetage," 1895. Here I have utilized the records of the two most recent 
generations, taking first the numbers of males and females in the very latest 
generations, and compared these fraternities with the fraternities of their fathers 
and mothers. I have taken only those families in which the eldest child was born 
prior to 1880. I have also left out of consideration those fraternities whose mothers 
were not also born in the peerage, because it would be very laborious to look up 
the ancestry of such mothers. It is really surprising how many peers of to-day 
marry the daughters of commoners, making it often necessary to turn over many 
pages of Burke to find a case where the maternal ancestry is recorded in this same 
book of the elite. 
