D. C. Gini.Sociology and Eugenics.325
the preceding birth : the percentage works out to 58% in Chemnitz, and to
67% in well-to-do English families. Much lower, on the contrary, is the
percentage among French employes (20%), probably because of the demo
graphic conditions peculiar to the French nation. (See Table XXV.)
TABLE XXVI.
Injnnt Mortality according to the Interval between a Birth and the Preceding
Birth. Well-to-do English Families(i).
OrderInterval between birth and preceding birth
of
birthI year and less1-2 yearsmore than 2 years
Number of deaths in first year of life per 100Dorn.
21676 31586
41596
5-61697 7-912-5109
10 and more201310
Total of others
thanI5'38-97'2
first born Number of deaths in first 5 years of life per 100 born
22012II 31912II
420HIO
5-62114II 7-91815H
10 and more23I815
Total of others
thanjç-ç13-6il-8
first born
Number of deaths between 2nd and 5th year of life per 100 survivors at one year.
Total of others
than5"35'iS’°
first bom
(*) The Data for this table were taken from Westergaard, Page 371, who
took them from Statistics of families (1874) Ch.
The deleterious consequences which too short a period after the preceding
birth have upon the vitality of the child are indisputable, at least during the
first year of life. This is shown by the data of Table XXVI., and I
should not be surprised if a sufficiently large number of observations were
found to confirm the results of Ewart (based upon too small a number of
observations to be accurate), according to which the height, weight, and
