Full text: Problems in eugenics

D. C. Gini.Sociology and Eugenics.3°3 
influence. In general, it seems reasonable to admit that the diversity of occupa­ 
tion, journeys, feasts, periods of fasting and mourning, and the other civil and 
religious customs may have a notable influence on the greater or lesser fre­ 
quency of conceptions. The influence of religious customs appears clearly if 
we compare the birth-rates in the Protestant districts of Germany with those of 
the Catholic and mixed. (See Table VI.) 
TABLE VI. 
Births according to months (i). 
Daily mean of births in each month, after making the daily mean for the 
whole year= 1,000. 
Month 
of Birth.Rout 188 
Bora in 
Townsnania 3-94 Born in 
Country 
DistrictsGerrr Legi 
Protestant Districtsany, 187 
timate B 
Catholic 
Districts2-80 irths MixedGerr Illegi 
Protestant Districtsnany, 18 
timate E 
Catholic 
Districts72-80 irths MixedProbable month of 
Conception 
12345678910 
January ...........1074847101710041025IOQI1077IOQ7April 
February...........1193IOÇ2103610431057II3Ô11781138May 
March ...........J0731012101610431046IO77112b1115June 
April ...........990IO8398210241002102310521064July 
May ...........9291112958990970988IOIQ1020August 
June ...........932IO32947978937950975963September 
July ........1 960ioçS965982951903942927October 
August ...........9689741003980988878860870November 
September93&9611077101710481018953963December October...........1058124.01012993IOOI918946887January 
November1006955998988997965928937February December8936059939559831061958IOIOMarch 
(x) The data for Roumania were worked out by the author from the original official statistics ; 
those for Germany are taken from Mayr, Statistik und Gesellschaftslehre. Page 172. 
We may, perhaps, ascribe the differences between town and country which 
in Roumania for example are considerable (see Table VI.) to the influence of 
the different professions. But it is probable that here, as certainly in other 
cases, the influence of the frequency of marriages according to months comes 
into play. 
I do not know upon what data the assertion is founded which is at present 
taken for granted by statisticians, that the monthly oscillations in the frequency 
of marriages have no sensible influence on the monthly oscillation in the 
frequency of births. The explanation of this fact should be found in the 
variation in the interval between marriage and first birth. 
However, it is clear that this variation may shew well marked differences 
from country to country according to the greater or less diffusion of Neo- 
Malthusian practices, the relative ages of those marrying, and especially, the 
greater or less frequency of conception before marriage. Owing to this, it may
	        

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