Drapers' Company Research Memoirs Volume 1-10; Studies in National Deterioration - London Dept University College

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 Excerpt: ...the 1882. It may be, therefore, that selection exhausted itself for the former in the first ten years, and thus we obtained small positive values for mru when proceeding to the twenty years. On the other hand the smaller values for the first ten years of life for the second cohort are followed by quite significant values for the twenty years. Thus selection in this case was reserved for the later years. This may not be the true explanation of the differences to be noted in the figures in this paragraph, but it seems a very probable one. Those born in Prussian rural districts in 1881 felt almost the full effects of selection in the first ten years of their life, but many of those born in 1882 felt its operation in later years. Much light would be thrown on the subject by taking different periods--in particular, the correlation between the deaths in the first two years of life with those in the next eighteen would be instructive--but the work has already far exceeded the original limits set for it and further investigation must be postponed. Expressing the mean values of x, and x, in terms of rates (see XVIII) we find the following figures: selection. XXIII. No other correlations have been worked out. Sufficient has been done to show conclusively that there is a definitely significant negative correlation between the number of deaths in the early years of life and those in a subsequent period, when correction is made for environment. It would be easy to suggest all sorts of different arrangements of the data and of the periods of time in which selection is taken to act. In particular it would be instructive to ascertain the correlations for many different periods when working with the same data. It is quite probable that we should have got higher value..."