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Group I, comprises 30 households with 148 children. In these no parental
taint appears, nor any relationship between such parents.
Group II, contains 14 households with 52 children where tuberculosis is the
only parental taint.
Group A, comprises 15 households, with 108 children where the only taint
is close relationship between the parents (cousins or second»cousins).
Group III, contains 37 households with 213 children where one, or (in excep»
tional cases) both parents were alcoholists, otherwise, no taint.
Group D, contains 12 households with 95 children. Parents were cousins,
and closer relationship, is found in one or two former generations.
The children in these households obtain a comparatively large »loss of
ancestors», as genealogists say.
If we now compare the numbers in table 5 we find that children in group I,
where no parental taints are seen, have proved to be decidedly better than those
in any other group. The number of children who have died before 5 years of
age, is least here, and the number of healthy persons over 15 years is greatest.
The number of »defectives» is considerably less than in the other groups.
In the tuberculosis group, mortality is greatest, and nativity least, but even
here »defectives» are not particurlarly numerous.
Group A, the relationship group, shows as a rule average rates.
The alcoholist group (III) shows considerably more disadvantageous rates
of percentage (see table).
The worst group is D, where closer relationship is found in 2 or more
successive generations, the mortality, in children of tender years is, in this group,
particularly high, and the nativity also. The number of »defectives» is also
great. Very defective persons appear at the rate of 17.9 %.
The children who have been unfortunate enough to be born in these house»
holds, have paid dearly for the ignorance or imprudence of their parents when
marrying. The pitiable consequences of marriages with relations in this unhappily
situated family, has been noticed to a certain extent by the inhabitants of the
district. Especially persons of other families residing there, but also nembers of
the Lister family have apparently been aware of the menace. Most marriages
however take place in this district, for economical reasons. When it is a question
of retaining a home»stead within the family, which has been in its possession
for a long time, all consideration for offspring is forgotten. In this district crass
egotism still prevails, not only in this family, but in many others in the country,
where one would have expected better.
The race*hygienic principles will lay the foundation for a higher and better form
of ethics, than obtains now, when these ideas become thoroughly, rooted in the
mind of the people at large.
These comparisions give us an interesting insight into the biological structure
of the family, if I may use such an expression.
They show us amongst other things, how difficult it is from a large mass
of material, to separate groups of households where no, or only one, paren»
tal taint appears, a grouping which permits certain conclusions to be drawn tou»
ching the importance of one or the other taints in connection with offspring.
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