Full text: Problems in eugenics

3 26Section III.D. C. Gini. 
Physical and Intellectual Development of Children at 6 years of Age 
according to the Interval between their Birth and the Preceding Birth. 
(Middlesboro\ births 1898-1905.) (1) 
Physical charactersIntellectual characters 
Interval betweenChildren of parents 
between 25 and 35Children belonging to 
well-to-do classes 
a birth and 
the preceding birthNumber of 
observa­ tionsMean stature in 
inchesMean weight in 
poundsNumber of 
observationsPercentage of children 
classified as 
above the 
intelligenceNumber of 
observationsPercentage of children 
classified as 
above the 
Less than 2 years15638-637'2r1 
2—2-518039' 938-8  ^2173*13737 
Three years and more1544Z'739'485328542 
(*) Data taken from R. J. Ewart. The influence of parental age on offspring. 
(The Eugenics Review, Vol. III., No. 3, October, 1911). Pages 211 and 220. 
mental capacity of children at six years of age are more or less sensibly 
inferior, as the period elapsing between one birth and another is shorter. 
(See Table XXVII.) 
It is not wise in any case to exaggerate the benefits which might accrue to 
the human race from a long interval between consecutive births : if this 
were always greater at two years, mortality in the first year of life would 
fall, according to Ansell’s data, from 8*9 to 7*2%, but in the four following 
years it would only fall from 5‘i to 5% of survivors at the end of the first 
year.NOTES. (1)—Number of survivors at 20 years of age in every 10,000 born in 
these counties :— 
Table of survival referring 
toYears to which the Table 
refersSurvivors at age of 20, 
on every 10,000 born. 
IndiaMales19014516 ,,Females>»4519 
Spain1880-844960 Ireland1881-907767 Denmark ...Males1895-9007671 Females997855 
NorwayMales1891/92-1900/9017770 Females197997 
YVest. AustraliaMales1899-9027727 
99 99Females>>8075

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