Heredity in relation to eugenics / by Charles Benedict Davenport.
- Charles Benedict Davenport
- Date:
- [1911]
Licence: In copyright
Credit: Heredity in relation to eugenics / by Charles Benedict Davenport. Source: Wellcome Collection.
Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.
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![families the children vary greatly in stature while in others they vary little is because mof-e diverse elements have entered into the make-up of the children in the first case than in the second. In the first case long and short blood are commingled in the ancestry while in the second case exclu- sively long or exclusively short ancestry as the case may be. The second general law is that when both parents are tall all of the children tend to be tall; but, on the contrary, if both parents are short some of the children will be short and some tall in ratios varying from 1:1 up to 2:1. If all of the grandparents are short then there tend to be twice as many short children as tall; but if one grandparent on each side be tall there will tend to be an equality of short and tall offspring. The evidence for the foregoing is found in the study of 104 families which furnished quantitative data as to stature for children, parents and grand- parents. To illustrate the inheritance of extreme short stature in a family I may quote from C. F. Swift (1888). He says (p. 473) I am unable to' give a particular account of the Little Hatches of Falmouth. [Mass.] They were children of Barna- bas, who married in 1776 his relative Abigail Hatch and had two sons and seven daughters. Six daughters were less than 4 feet in height. None married. The seventh daughter Rebecca was of common size and married Robert Hammond. The two sons, Barnabas, born in 1788, and Robinson, b. 1790, were both of low stature, one, scarce 4 feet in height, was a portly gentleman almost as broad as long. It may be pre- dicted that the tall daughter who married had only tall chil- dren. 6. Total Body Weight Adult weight (assuming density to be constant) depends upon stature and circumference. It is, therefore, still more](https://iiif.wellcomecollection.org/image/b21462719_0063.jp2/full/800%2C/0/default.jpg)
