Exhibit C 54—56.25
born. Also in well-to-do families, where the age of fathers at the
time of procreation is materially higher, the first born are more
frequently myopic than their brothers or sisters.”
A large amount of material has been treated by W. Weinberg,
in which tuberculous and non-tuberculous families are compared.
Figure C 55—influence of numerical position of birth on infant C
mortality and Figure C 56—mortality of the first and later born.
Weinberg writes concerning these : “ The parallelograms in the first
row indicate for each position in order of birth how many children
out of every hundred die before the age of 20. On this, however,
Mortality of Children According to Sequence of Birth.
3,129 Tuberculous and 1,830 Non-Tuberculous Families of Stuttgart,
1873-1889 (after Weinberg).
nontuberculpustuberculous
Percentage of chil- Death rates expressed Percentage of chil
dren born alive who in relative figures cor- dren born alive who
died before reaching rected for differences died before reaching
their 20th year. in the death rates in their 20th year,
families differing in
size.Death rates expressed
in relative figures cor
rected for differences
in the death rates in
families differing in
size.
Paternal family,
■ft-1*
the difference in the mortality in families with different numbers of
children has an influence. To counteract this, it has been calcu
lated how many children in each position would die if within each
family the number of children had no influence, and the actual
number of deaths expressed as a percentage of the expectation
calculated in this way gives parallelograms to the second row.
After eliminating the influence exercised by the size of the family,
the increase of the mortality with the higher birth number appears
