Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume XII, Part II (1899)
Chandler, Charles H.
The inter-generation period, pp. -504 PDF (2.2 MB)
THE INTER-GENERATION PERIOD. WITH PLATES X AND XI. CHARLES H. CHANDLER. The question here considered is whether the popularly re- ceived idea that the average interval between successive gener- ations is one-third of a century, has a sufficient foundation in fact. The result of an examination of nearly sixteen thousand dates of births and the computation of mean dates is presented in the accompanying tables and diagrams. I As all the records involved in this examination have been those of New England families, it is evident that it is an en- tirely pertinent question whether the resulting inferences are applicable to other sections of country. Especially may it ap- pear that in regions where marriages are contracted at an ear- lier age the interval certainly will be considerably shortened. But- on--the other handy it must--be- ensidrd that in those regions families are larger, and marriages in which the woman is very much younger than the man are more frequent, both of which conditions tend to lengthen the inter-generation period; so that without careful investigation it is by no means safe to assume that the generations follow in more rapid succession than under what at first seem to be the more deliberate con- ditions of New England. Each of the four tables here given represents the descendants of a common ancestor; the first column giving the numbers of the generations from that ancestor, the second column the num- ber of recorded dates of births in each generation, the third the mean date of those births, the fourth the interval between each generation (after the first) and the one preceding it, and the last column the sum of the three preceding intervals. -"- - '--- - p- -11 ! I - -.- .. I I I .
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